This is sort of a question as I haven't used vanilla mame in a long time, but can the built in GUI handle the following?
1. Display a list of only the games the user currently has roms for? 2. Show the total number of available roms? 3. Ability to filter out devices, bios from list? 4. Show only Arcade or Console games in list? 5. If game is missing roms and fails to start, I'd like it to display a list of missing roms 6. A "reset to default" option in the HLSL slider controls.
These are the features I'd want in the built-in GUI.