Iirc DSL used to fit on mini/business card CDs. No real motivation to get much smaller - unless fitting on a floppy. Then for a while there were small usb drive

Iirc DSL used to fit on mini/business card CDs. No real motivation to get much smaller - unless fitting on a floppy. Then for a while there were small usb drives that were interesting, and with better options for persistent user data than r/w CDs.