The only major difference from an old version of LMMS (0.3.x) and a new one now is the UI response, which is sub-optimal.
True, especially if you're running a full-time DAW it'd be a pain to keep switching between the two subsystems.
> I even believe that Apache and Open
> Office should have JACK support.
Priceless =p
But I don't think that's a joke, it's possible, at least more so for OO as the need for office productivity and multimedia "integration" grows.