I'm running Arch for a very long time. I agree this is not a distro for general audience. I disagree, however, that it is not stable. When I'm doing work I don't update my system. I enjoy my stable configuration and when I have time, I do update, I curiously watch which amazing foss software had an update. And I try them. I check my new firefox. I check gimp's new features. etc.. or if I have to do something I easily fix it, like in no time because I know my OS. Then I enjoy my stable system again.
Do you want to know what's unstable? When I had my new AMD GPU that I built my own kernel for, because the driver wasn't in mainline. And it randomly crashed the system. That's unstable.
Or when I installed my 3rd DE in ubuntu and apt couldn't deal with it, it somehow removed X.org. And I couldn't fix it. That's also something I don't want. Arch updates are much better than this.