I used Arch Linux around 4 years back. I did a routine upgrade and it broke my system.
What is this rolling release fiasco? Even Ubuntu, which I use now has a "release" (technically an pt-get upgrade), almost every other day. But I've never had it break my system. If you keep your Ubuntu updated a dist-upgrade works just fine.
I might try Arch again, but for now I'm sticking to Ubuntu.