but of course... there would be no minidisc in that history
which is a wee bit of a shame cos the physicality of minidisc is neat and is the design cousin of the 3.5" floppy
minidisc couldn't hold much uncompressed music
but DAT did
so... what would SDAT do that would've made it super?
i guess higher helical scan density? which would be more playback time, or high sample rate music earlier than in our timeline, i suppose