After some reading I believe that removing .bin extentions from ES is a good idea. What do you think?
It is very common for PSX games to be in 2 parts, a .bin and .cue, this means that Emulation Station will show duplicates for each game which no-one really wants. This is because it used to show extensions .bin and .cue
A PSX game will only ever need one .cue file, so by hiding a .bin it prevents duplicates showing (as it could have multiple .bin files)
By hiding .bin files it will make the user think a little bit more about how the emulator loads files rather than blindly throwing files at it until it works.
Any PSX game that has multi tracks will work better (usually audio tracks) if it has a .cue to point to the audio.
https://retropie.org.uk/forum/topic/735/psx-please-remove-bin-from-the-file-types