I use the basic setup, with Ruffle and EmulationStation on the Deck!

You can have multiple bootable images on a pendrive with Ventoy, and also store a few other files there (if there's enough space)!

I will continue playing Clair Obscur: Expedition 33 sooner or later (around Act 2 middle/end, switched to Story Mode). Yesterday I played AshBelt, a Flash game with Ruffle+EmulationStation with a High Score of 83. I'm about to make a PeerTube channel to upload videos about games, without chapters disappearing I hope...!