[y-c-o-m-b]

Ableton + Serum + many custom VSTs user here. You're spot on. This is actually the biggest reason I can't switch. In fact Steve Duda (creator of Serum) has said many times that he doesn't ever plan to support Linux. That's not a deal-breaker necessarily, but the fact we paid lots of money for this stuff makes it a bit unreasonable to switch to Linux.