Most stuff I see works with Sierra - obviously with some questionmarks. But, I see no need in updating yet. Nothing that new, even though Pro Tools is working in it. But it only takes a plugin or driver to screw you over. Best to wait at least till it becomes clear that most have also made the move - helps iron out the initial teething problems. I only just moved up to El Capitan recently, I was on Mountain lion and Mavericks for ages, I never even went to Yosemite.