Yes. Yes it is. I had a single Windows install that was my main system. I eventually decided to semi-switch to Linux, and passed that SSD through to a VM, along with the GPU and half of my USB ports in order to continue running that Windows install for gaming and Adobe stuff. You just have to keep messing around with the config of the VM, and look up info about getting your UUID from Windows to add to your VM config, so your Windows license/activation will keep working as is. There are guides and info for all of this if you Google around. Don’t remember exactly where I found those guides, as I ran that setup for about year and then switched that Windows install back to bare metal, and it has been about another year since then. I do remember that I got the same boot issues as you when switching back and forth between bare metal and VM, and I had to run the Windows boot repair tools to get everything working. Trying looking into that.

I’ve been using it for the last year or so, no issues, as long as I confirm there are no breaking changes before updating my docker container. My only real problem is that I sorely, SORELY, miss the editing features I had in Google photos. There’s been more than a couple of times now that I needed to quickly edit a photo as I would have done with Google photos, and when I couldn’t, got aggravated enough to consider switching back. Still chugging along on immich, though. Still holding out hope that one day they’ll add at least some basic editing features.