Unraid is an operating system for network-attached storage that lets you use what you have to build the server you want. Mix and match drives, securely store and share data, and manage VMs and Docker applications—all from a powerful, web-based interface.
The installation and operation is via a USB stick, which just seems great versus dealing with wiping drives and partititions.
Most interesting to me is running Windows in a VM. You can pass through a graphics card to enable gaming or video editing.
I don't want to manage a dedicated Windows box, and also don't want to dual boot and take down a Linux server, so this seems ideal.
I bought a licene and a test install on MiniPC Z-Space Server, which isn't quite the right hardware for a Windows VM, because it doesn't have good graphic card options.