Not on Steam, but Boomerang Fu was one of the best game I purchased for ~$3. Probably my most played game on Switch.
Those are great for hosting a Ubuntu server (as long as they are not CPU intensive). You can buy a dongle to connect it to the router for Ethernet, then add a SD card or connect a hard drive by USB and it's quite solid. There's a few tweaks needed but it's an incredible learning experience.
I plan to have a 8-10TB HDD for media storage. So I guess ssd would still make sense (since the docker stuff will still be store on ssd)?
What grinder do you use?