I have another suggestion which doesn't contradict yours:
This is only a small part of it (tech addiction 24/7 via phone); certainly there is something bigger at play, here (e.g: "the brain isn't the same anymore;" agreed).
I do not use email nor a cell phone (several years; outgoing landline, only), so I have more than enough time to ruminate (and read a few dozen books, annually) – and yet agree very much with OC's theory on needing mental health exercises to replace our newfound AGI tools/workers.
As an extremely conversive person (unbound by a cellphone), it's become an extremely strange world, particularly when talking with strangers, even in just the past two years. It's like: everybody is just mentally exhausted, mortal.
I know I am.
–Phoneless
> It's like: everybody is just mentally exhausted, mortal.
Very much this. I think a lot of it is that the "slack" of our lives is being eliminated little bit by little bit to improve "productivity", and in so doing it is making life harder, mentally and physically, in ways that we don't really grasp because we're the frog being boiled. We are more "productive" and "efficient" than ever, but we're not happier or living better lives, and a lot of that I think is due to us eking out the last bit of gain for our work lives and leaving nothing left in the tank for when we aren't working.
This three day weekend, I only really felt like I could do things today, but now I have to go back to work tomorrow. Wouldn't it be great if I didn't need 2-3 days just to become a normal person again every time I don't have to work? Wouldn't it be great if I could use at least one day on the weekend every weekend to do something of personal interest rather than mental recovery in a fog?
Maybe we’re just getting older.