I like the idea of MP3 CDs and how they can display metadata in some players. Is there a way to make an MP3 CD using FLAC so the CD has the same quality as an audio CD but can display more information with Vorbis comments compared to CD Text? Can EAC do this?

You’d just have to burn it as a data CD. However IDK if there are any standalone players that play FLAC CDs.

An “MP3 CD” logically holds mp3s, not FLAC files…