I don't think it's that per se, it's just apple has a lot of resources to optimise/test a relatively small amount of configurations.

The big "issue" with Linux on non-server workloads imo is a lack of testing like this - which is completely understandable. Afiak Microsoft runs millions of automated tests on various hardware configurations _a day_.

Intel does something similar for the Linux kernel, which no doubt explains the relative stability of Linux server vs Desktop (servers are running far less "OS level" software in general in day to day use than the desktop).

The desktop experience itself needs more automated testing. There are so many bugs/regressions which I've noticed in eg gnome which should have been caught by e2e testing - I do try to report them when I see them.

Doing a bit more digging there seems to be some basic e2e testing for gnome ran nightly but currently most tests are failing https://openqa.gnome.org/tests/12128.

This isn't a criticism at all btw, it's quite boring and resource intensive work for a project like gnome to do. I hope soon some large corp decides to go all in on realLinux desktop (not ChromeOS) and can devote resources to this.