Lots of good insight there. While I disagree with much of it, I get it.

I’m all for keeping one’s cognitive skills. However it is a fact that this decline happens, and that there is a phase of life where one has wisdom without necessarily having the same raw intelligence they had before. The wisdom is encoded in crystallized intelligence.

Yeah, realizing you have that wisdom is eye opening and it's actually pretty powerful. I can hunt down bugs by smell now with surprising accuracy. But I'm not convinced it's mutually exclusive to fluidity. I guess I'm just hoping my brain doesn't petrify and am battling against it.

That was possible because those machines don’t change too much as time marches on. Because they use a stable platform, his organization was able to do better work by relying on his deep expertise. He could train those younger guys because it was the same platform he’d always used. Same dirt, same physics, mostly the same machines, same techniques, same pitfalls, etc.

It's a poor analogy for software though. Software is an ongoing conversation. Not a device you build and forget about. User demands change, hardware changes, bugs are found, and performance is improved.

I'm honestly curious what the oldest line of code in the Linux kernel is now. I would be pretty shocked to see that anything survived 30 years. And I don't think that's because of enshittification.

This example doesn’t work as well with C/++ since that’s older than most people here (though the language has also gone through iterations) and likely won’t be going away any time soon. But still, in most cases you probably don’t want to use that language for general work.

Why not? Because you won’t be able to hire younger devs? That is a function of this culture of pushing for change in everything.

No, because C/++ isn't the right tool for every job. If I want to write up something quick and dirty to download a sequence of files, I'm not going to write that in C. It's worth learning other things.

I have to admit though that the conservative approach is more suited to things like a kernel, aerospace applications, or other things with lives riding on it. But also software that doesn't change becomes useless and irrelevant very quickly. For instance, running Windows XP is a bad call in just about any case.

But again I'm also not trying to say all software should be trend following. Just that devs should embrace learning and experiencing new things.

Netflix is using FreeBSD for servers. You can't blame everything they do wrong as being a problem with the new hires. They are using an OS older than Linux that changes more slowly than Linux, simply because it performs the best for their specific application. Rate of change isn't the issue here.

In fact that's 90% of what this comment is. Blaming new people and new techniques for problems when you aren't a part of that organisation and don't actually know what's happening.

Working with computers is not the same as working with construction equipment. Some degree of fluid intelligence is needed in this field, no matter how experienced you might be, just like how a surgeon needs steady hands. The people you call greybeards aren't nearly as old as your father is. We are talking about people who are in their 50s and 40s. They don't have that level of cognitive decline yet. Likewise some things like ext4 aren't likely going to be ported to Rust now or even ever. They can keep maintaining them as they are now for the foreseeable future. Plus I don't want people to have to keep working into their 70s and 80s. At some point it becomes elder abuse. Let people retire man.

C has existed for a long time now. We've been trying to replace it for ages, for most of it's lifespan even. C++ actually was one of the new options at one point. I get it seemed immovable only a decade ago, and I think that has lulled people into a false sense of security. In truth it was inevitable it would have to be replaced one day. It's already well outlived the life expectancy of a programming language. Just think about Ruby: created long after C yet has already become mostly irrelevant. You talk about the maximum rate of tool change, but C is one of the oldest tools we have, keeping it around would be almost 0 rate of tool change over decades. If you can't see that C is very slowly dying then you haven't seen the writing on the wall for the past several years. It's on you at that point.

We should look back with pride at everything that has been accomplished with C, and just how long it's been relevant. We can do this while still acknowledging it needs to be phased out gradually.

No one is asking for change that rapid either. Linux started adopting Rust four years ago now. It's probably still going to have C code inside it for at least a decade from now. This isn't some quick change, it's a gradual process. People have plenty of time to adapt, and those who are too old to do so will be around retirement agent if not already dead by the time C is fully phased out.

We of course play plenty of video games together to keep him sharp. We also eat mushrooms, paper when necessary, and he works out a lot. We do all we can, believe me.

Honestly you take more care of yourself and your father than I do. I am only in my 20s and suck at video games. If I took mushies or LSD I would probably lose my mind, assuming it's all still there in the first place. I suspect there is a good reason why people like me only have a life expectancy of 58 or so.

I never said anything about someone's usefulness as a person. Their usefulness as a software developer was the topic at hand. Maybe it's not your profession but a hobby but the point stands.

I think the very phrase ‘my usefulness’ is dangerous. Are we only worth something as drones?

And yet it's drones that do one thing and only one thing their entire lives, never learn and grow.

employment potential and learning are generally problems if you are young. if you are old, the time investment to learn a new language is generally not self beneficial as your time of employability starts to dwindle.

Middle age software engineer here. Very disagree. Hoping to code until arthritis gets me. My point wasn't only for employment (more of a perk), but primarily self-improvement and improvement on your craft. The day I can no longer do that, that may be the end for me.

That said, I don't know what Linux community should do about Rust adoption. I just wanted to point out that I think it's very important for all devs to be able to embrace learning new things and expand and refine their skillset.