I have a pipeline that's been running on OS X for many years. I use some Mac specific tools and my entire color calibration setup has been dialed in on OS X and that involved a lot of time, work and money. All of my RAID systems are Thunderbolt. Switching isn't impossible, but not a trivial decision. I don't need a 44 core dual pro machine, but something less anemic than the current nMP and with more expansion abilities and greater reliability.
I've been working on the Mac since the Fat Mac 512k (circa 1989) and use a mix of Linux, Windows and OS X at work. I've actually owned a few Windows boxes over the years going all the way back to NT 4.0, but have never been thrilled with them. I will say that Win10 looks like an improvement, but having to learn how to maintain Windows would take up a lot of my precious time and is something I would want to avoid unless it's absolutely necessary.
I am in the exact same situation, as are many others.
Apple is really testing our patience.
Seriously, Tim Cook isn't even answering my emails, and I was very nice in all of them.