But is it worth it? How many people feel compelled to see a portrait of the sound engineer while listening to a track...
Anyway, everybody can do as he pleases...
My considerations would be:
Even if the files are all small they still add up to more kbs which is never good on a portable device.
Embedding would also mean that each file of an album would carry all these pictures which is a major drawback.
Just now I have extracted big artwork - ie album covers - and reduced their file size to a maximum of 150kb. After re-embedding them I still have 8MB less - per MP3-album! Good for portable devices.
Music Bee 3; EAC; MP3Tag; Music on Synology NAS 115; Logitech Media Server on RPI 3; RPI 2 with Hifiberry; Poweramp for Android/Lineage