Bitwig is running mighty fine on Linux so I'm seriously considering using it instead of Ableton to play on stage. I always need to adapt my tracks for live situations anyway, so it's not a lot of additional work. Also:

1) My mac is old and heavy.
2) My everyday laptop is a very decent and light PC.
3) I really tried, but Windows still kinda sucks for audio.
4) Audio on Linux is surprisingly stable, performant and flexible, if you don't mind spending some time getting it to work.