A friend of mine has been complaining that a DAW is the only thing keeping him stuck in Windows at this point as well. In his case, he specifically said that VST's were the problem. Was your experience the same?
VSTs are definitely an issue; most high quality commercial plugins are still only released for mac/windows. However there are a few projects for running them in wine and it generally works pretty well.
I do think we'll see more and more Linux in studios going forward, but it would help if Linux got its pro audio story together. Pipewire is a big step in the right direction but not yet mature.