Earlier quoted context omitted.
I have to disagree. The comparison you make is unfair. I experienced QNX and Beos too. But what could you really do with it out of the box, compared to a full blown Linux-distro? The 'feeling' of snappiness is a matter of carefully choosen defaults IMO. Almost nobody does that anymore. So have this lowest common denominator, and mostly crappy tools to change them from within the GUI, or have to dive down in the cessp…
shrug I've had Linux desktops across Debian, Mandrake, Gentoo, Ubuntu, and maybe some others. Oh I think Fedora in there somewhere. Gentoo and the first few years of Ubuntu (pre-Pulseaudio, basically, though it's not the only reason it suddenly got worse right around that time) were the only ones that felt like they weren't built on some kind of horrid Jenga tower always on the verge of toppling over, but in Gentoo's…
Only Mandrake and PCLinuxOS got this right, they had nothing in /etc which wasn't applicable, because somehow generated programmatically by their installer, according to the choosen configuration.
That was CLEAN, there were no useless ##commented out things for stuff the system didn't even had installed.
Unfortunately their package repos at the time were 'clean' (meaning lacking the stuff i needed/wanted) too.
SUSE also tried this with YAST, but got it wrong often, and felt sluggish and bloated.
I can't really remember XFree86 and later Xorg crashing on me, except when pushing its boundaries wrt multi monitor and hotplugging, i guess that depends on the used hardware and the quality of their drivers?