The advantage Windows has is Intune for device management.
The disadvantage is having to use Intune.
Linux is just much easier to script an install an manage using any of the IaC tools you might already be using for your servers. Yes, you can manage Windows with the same tools but it just isn't as reliable in my experience.
RISC vs CISC doesn't really matter. Both have heavily borrowed from each other. The big differences are design goals, x86 processors are targeting higher power processing with few very fast cores while Arm and Risc V mostly target embedded and low power computing or a huge number of smaller cores.
I had the opportunity to check out a bunch of S3 servers for work. For a quick summary, Garage was much faster than Minio in my tests but lacks advanced S3 features like object locking, versions or retention. Be sure to check what you need before switching.
Also, it's CLI only as far as I know, so the same as Minio will be.
Use one artist for album artist. For the artist field, look up how to properly split entries. This is different for IDv3 vs Vorbis. Split the artists and Jellyfin will handle it fine.
This isn't implemented yet, sadly we also have stupid politicians like the rest of the world.