Depends entirely on what games you play. Older audience are probably more likely to be into older less demanding games too. Personally the most recent game I've touched are from 2020 and 2023, and those are two big exceptions.

I'd need another lifetime or three to go through the catalog of classic games it can run. Not everyone is chasing the dragon. If you're not pixel peeping or prone to crashing out every time the FPS dips below 60, you'll survive just fine. Turn the graphics slider down a notch and just enjoy the game. And as a portable PC I could probably get another decade out of the thing so long as the battery holds up or replacements remain available. It's not like anything revolutionary is coming that's gonna require me to have a better GPU just to fire off some SQL queries, fuss around in office software, compile some TeX, or whatever else.

can one play all, or just the best ps1-2, nintendo, and pc games in a few years?

There is now a selection of handhelds out there that are newer and arguably better, but they're also expensive. I kinda think the Lenovo legion go gen 2 might be cool with steam OS installed - but it costs like 2k

I guess it's my imagination all the games I've been playing. Too bad, I'll have to throw it away now.

Rich? Definitely not, more well off than the lower average, yes.

Where does steady work at a 9-5 make you rich.

Lol?