I'm just wondering, what's the use case of Ableton for multiple users?
I actually got Live 8 working surprisingly well under wine but far from really usable.
I replace my old macbook pro with a macbook air + live 8 suite (upped to 9 yesterday) because it simply the better experience for ableton and sound apps in general. For example KXStudio is awesome and I use it, but many of the best Linux sound apps get ported to OS X anyway.
But, "just working" is relative, imho. GNOME hasn't just worked... ever.