> Does that imply that Linux is not stable?

The desktop environment is not, no. Various applications one is likely to run on it are not, compared to some closed-source alternatives, including those provided on macOS.

Heavy Linux on the Desktop user for about 10 years, here (~2001-2011). I still try it periodically. I see a lot more bad glitches, X/Wayland crashes (may as well be a whole system crash, on a desktop), and application crashes, on Linux than elsewhere. I find it's most stable when I build up from something minimal and hand-configure everything, but I just don't have time for that anymore, and stopped finding it entertaining years ago.