/vr/ - Retro Games

So I decided to jump on the RG35XX H train simply for some GB and GBA games since it was on sale at a reasonable price and I'm wondering what CFW should I bother jumping to?
GarlicOS apparently just started being reasonably recommended recently based on what I'm searching.
ArcOS seemed like the safest bet and the way to go.
muOS seems like the most mature of the lot.
Batocera seems like muOS?

I'm not really sure what I should be looking at here. Also, when it comes to taking screenshots do I need to grab something on the Linux side or does their version of Retroarch allow it natively? Does it take screenshots in the native resolution or however it's gonna be scaled up for the screen? It's hard to find information on this at all, just people asking where their screenshots are.