Not sure if this is the right place ...
Moved over to Batocera from Retropie and I like it. Only thing missing (for me) was Basilisk II, as I run a Pi 3B+ inside a Macintosh Classic case.
So spent today learning Batocera’s locked down file system 😉 and how to get Basilisk II up and running. And succeeded !!
Instructions here: https://bertouche.com/?p=84