[Jachin99]

Would the AML library and configuration files be directly compatible with AEL?  Could I for example build launchers and game libraries for console games using AML today, and install AEL later on when it has been updated to Python 3?  Thanks.

AEL and AML are independent add-ons. You can have either or both installed. In AML you don't setup any launcher, just point to the mame executable and the roms directory (which can be empty) and AML extracts all game information from the mame executable. AML is much easier to setup than AEL. AML only supports MAME and no other application. Currently AML works in Python 3 but not AEL.

That helps a lot, thanks.