We have some very limited ideas from correlation and limited lab testing that allows us to say easy things like putting junk in vital veins is bad (the nature article) but that's only a fraction of the types of microplastic and possible interactions - we know almost nothing about most of what's happening.

And to be clear I said they might be good for us as hyperbole, it's of course possible but what's far more likely is a myriad of long lasting health effects causing serious damage in obscure and complex ways.

In a century they might be saying 'those plastic brain gen alpha caused so many problems' just as how it's common to hear people talk about lead brain boomers... or maybe 'wow crazy micro plastic gave us superpowers, that was lucky'