Switched to full time Arch because I didn’t want to run Windows Privacy Invasion Goes to 11. And it’s been pretty good. Valve gets a big “thank you” for their contributions to WINE and making gaming on Linux nearly as seamless as Windows.
It’s probably still true that “Next year” will be the year of Linux on the desktop, and it will be for several more years to come. But, it’s starting to feel like cracks are forming in the Microsoft wall.
Have you considered just beige boxing a server yourself? My home server is a mini-ITX board from Asus running a Core i5, 32GB of RAM and a stack of SATA HDDs all stuffed in a smaller case. Nothing fancy, just hardware picked to fulfill my needs.
Limiting yourself to bespoke systems means limiting yourself to what someone else wanted to build. The main downside to building it yourself is ensuring hardware comparability with the OS/software you want to run. If you are willing to take that on, you can tailor your server to just what you want.