Yeah that comment does not make much sense. Our bodies have to function every day moving around and doing things. The lab grown stuff just needs to make cells. It should be much closer to growing fungus or yeast.

You're right and I think the commenter was sprouting bollocks. Reddit used to be plagued with comments like that which are simply meant to cast doubt, and aren't based on facts.

Cows are not the best choice, but bioreactors are still worse. At least with current tech.

From this article:

It’s a complex, precise, energy-intensive process, but the output of this single bioreactor train would be comparatively tiny. The hypothetical factory would need to have 130 production lines like the one I’ve just described, with more than 600 bioreactors all running simultaneously. Nothing on this scale has ever existed—though if we wanted to switch to cultivated meat by 2030, we’d better start now. If cultured protein is going to be even 10 percent of the world’s meat supply by 2030, we will need 4,000 factories like the one GFI envisions, according to an analysis by the trade publication Food Navigator. To meet that deadline, building at a rate of one mega-facility a day would be too slow.

All of those facilities would also come with a heart-stopping price tag: a minimum of $1.8 trillion, according to Food Navigator. That’s where things get complicated. It’s where critics say—and even GFI’s own numbers suggest—that cell-cultured meat may never be economically viable, even if it’s technically feasible.

[...]

Humbird spent more than two years preparing his analysis for Open Philanthropy. The resulting document, which clocks in at 100 single-spaced pages with notes and appendices, is the most comprehensive public study of the challenges cultured meat companies will face. (An abridged, formally peer-reviewed version has since appeared in the journal Biotechnology and Bioengineering.) Their future doesn’t look good. Humbird worked off the assumption that the industry would grow to produce 100 kilotons per year worldwide—roughly the amount of plant-based “meat” produced in 2020. He found that even given those economies of scale, which would lower input and material costs to prices that don’t exist today, a facility producing roughly 6.8 kilotons of cultured meat per year would fail to create a cost-competitive product. Using large, 20,000 L reactors would result in a production cost of about $17 per pound of meat, according to the analysis. Relying on smaller, more medium-efficient perfusion reactors would be even pricier, resulting in a final cost of over $23 per pound.

CC: @ChimpanzeeThat @HubertManne

YUK I don't think that will sell very well. There will be more than enough resistance to lab grown "meat".

Yeah, I'm 100% down with cricket-based protein, but even I balk at maggot-based protein. Gonna be a hard sell, for sure.

Some articles:
https://thecounter.org/lab-grown-cultivated-meat-cost-at-scale/
https://www.ucdavis.edu/food/news/lab-grown-meat-carbon-footprint-worse-beef
https://onlinelibrary.wiley.com/doi/10.1002/bit.27848 (this is a very technical and in-depth article, but you can skip to the conclusion section)

A 25min documentary video showcasing some views from experts:
https://www.youtube.com/watch?v=V0zCf4Yup34

How much does it cost to maintain such a factory compared to how much does it cost to keep livestock for the same amount of produce?

I didn't say it's not possible to culture it, I'm saying it's more expensive and less sustainable. The food industry is huge, current livestock production is already among the largest CO2 producers. So if we want to replace them we should choose an option that is cheaper and produces less waste, not more. Otherwise the costs of food as well as the CO2 levels are gonna skyrocket.

It's hard to compare with current bioreactors because for making it our primary meat source you'd need a scale that hasn't existed ever before in the pharmaceutical industry. The cell density needs to be relatively low, so you need huge tanks for tiny amounts. Also.. meat cultures are particularly sensitive to both bacterial AND viral infections. Meat production is slow and the smallest contamination at the start can very easily make the end result not up to standards.

Quoting from this article.

“A key difference in the CE Delft study is that everything was assumed to be food-grade,” Swartz said. That distinction, of whether facilities will be able to operate at food- or pharma-grade specs, will perhaps more than anything determine the future viability of cultivated meat.

The Open Philanthropy report assumes the opposite: that cultivated meat production will need to take place in aseptic “clean rooms” where virtually no contamination exists. For his cost accounting, Humbird projected the need for a Class 8 clean room—an enclosed space where piped-in, purified oxygen blows away threatening particles as masked, hooded workers come in and out, likely through an airlock or sterile gowning room. To meet international standards for airborne particulate matter, the air inside would be replaced at a rate of 10 to 25 times an hour, compared to 2 to 4 times in a conventional building. The area where the cell lines are maintained and seeded would need a Class 6 clean room, an even more intensive specification that runs with an air replacement rate of 90 to 180 times per hour.

The simple reason: In cell culture, sterility is paramount. Animal cells “grow so slowly that if we get any bacteria in a culture—well, then we’ve just got a bacteria culture,” Humbird said. “Bacteria grow every 20 minutes, and the animal cells are stuck at 24 hours. You’re going to crush the culture in hours with a contamination event.”

Viruses also present a unique problem. Because cultured animal cells are alive, they can get infected just the way living animals can.

“There are documented cases of, basically, operators getting the culture sick,” Humbird said. “Not even because the operator themselves had a cold. But there was a virus particle on a glove. Or not cleaned out of a line. The culture has no immune system. If there’s virus particles in there that can infect the cells, they will. And generally, the cells just die, and then there’s no product anymore. You just dump it.”

If even a single speck of bacteria can spoil batches and halt production, clean rooms may turn out to be a basic, necessary precondition. It may not matter if governments end up allowing cultured meat facilities to produce at food-grade specs, critics say—cells are so intensely vulnerable that they’ll likely need protection to survive.

This is referencing a very in-depth paper by PhD, PE, Chemical Engineer David Humbird.