Also, ‘years’ tend to be a lot more hours for kids, and each hour yields more learning due to neuroplasticity. I learned so much faster at 15 than I do at 35. I know more now, which often more than makes up for slower learning, but I can’t learn difficult novel subjects in depth as fast as I once did.

I’m glad I learned OS in depth during high school via Gentoo linux. And engineering/physics/math in college. It’s very easy to assimilate any new knowledge which can be understood through those areas of first principles.

But learning more advanced math is quite a task now.

Can you really say that unless you switched fields multiple times? Of course you'll pick up on math and physics faster in high school than in college or postgrad, but that's because the problems get way, way harder as you progress. I've found that even in my late 30s I can still easily pick up new skills outside my field of expertise as long as I start with the basics that could also be picked up by a high-schooler. I started learning a new language last year and thanks to modern study apps, I actually find it easier today. Of course it will still take a long time to become an expert, but I'm not sure it would need more total hours than if I had started 20 years ago. It just gets more difficult to allocate the necessary hours for learning.

Gentoo is what really made Linux click for me, too. I'm still very, very glad for that and remain a loyal user to this day!

Although I've had to restrict it to the 2 desktop machines. Maybe I should give it a shot again on the laptops, now that binary packages are universally available...

I don't know - i'm 33 ~ now - recently with AI learning is much easier - don't get me wrong I definitely won't say that the brain does not slow down - but I'd definitely argue that we have advantages over kids - be it discipline, knowing how to learn ; and stuff like that - for example let's take coq which is I suppose one of the hardest thing we can learn - you can decompose it in ways myself as a kid or as a 20yo wouldn't even be able to. What I mean is that there is a lot of complexities or stuff i would get stuck upon that I just fly over today and know I'm alright - much better ability to focus in a sense

I'm learning better now the older I get. More good'erer.