> I can now easily work every waking minute, and some sleeping minutes, at a level approximately comparable to my prior 8h workload from 10 years ago.

That is not something that should be celebrated.

It is a warning sign.

I find it enjoyable to have the energy to think, and less cognitive overload by firing off a suggestion to be checked overnight.

You're right that this would be awful if mandatory.

but it often was socially mandatory!

At least when those times come, the work can go much further before I have to actually "check in" vs doing some well-trod analysis via automation I've set up. That's great!