Unfortunate but not unexpected. We're probably going to see this more the further we get from cross gen console games.
ISolox
Cool devices, but I've seen Beelink PCs with better specs and for cheaper. Cool if you want the case but not really worth it at the end of the day.
This game is actually amazing. Me and my friends play it almost daily. It is crazy how crazy the quality is for being a free open source game.
Summer sale is June 27th. I would expect it to go on sale then. You can also keep an eye on deal.gg and see if you can get a key elsewhere. Buy at your own risk though as most of the sites on there are key resellers with unknown origin how they got them.
There's a docker image called wg-easy I use with a nice web interface.
A lot of the modern arm chips are 64 bit now fortunately. Not sure about RISC.
Armbian with CasaOS
I can't speak on moonlight specifically on the pi 4, but it running steamlink on wasn't bad on it, so I can't imagine it's would be any worse than that for moonlight.
Wired Nvidia shield TV has been my best experience when it comes to both moonlight and steam link out of all of the devices I've tried it with.
On one hand, I get it. People can be unnecessarily toxic, but completely ignoring feedback just doesn't seem right either.