To me in the 90s uptime was mostly limited by the fact that every month or so there was a new Linux kernel with a feature, driver, or fix that actually mattered

To me in the 90s uptime was mostly limited by the fact that every month or so there was a new Linux kernel with a feature, driver, or fix that actually mattered to me. And I'd do `make oldconfig` to answer only new questions. Now, it just works... mostly. systemd came in and made it like it's the 90s all over again with just plain basic things no longer working. It's pretty much stabilized in my experience in the last year, though, but it took years. The latest disaster in sound systems was well into the '10s, and actually not quite "just works" yet. As for phone, I bounce it about once a month when the bluetooth stack just stops working. And that's all for Linux. *BSD tends to go "Yeah, we don't do that here" about POSIX, so it can be unpredictable. And Solaris is just madness. So no, I wouldn't say we're quite into "basic stuff works" just yet.