At some point, 5MB of storage went from something that would kill you if dropped on your head, to something you might choke on if accidentally ingested.
(I'd put the cutover in the mid-1980s, when a handful of floppies would both be too large to swallow and too light to do much drop damage)
( 5120Kb / 360Kb = 14.2 floppies, and they weigh 18 grams a piece,
15 floppies at 18 grams is 0.27Kg = 9.5 oz.) Box and a half of 10.
ONE floppy would be too much to swallow, and although soft, its corner could do some damage if dropped on the sharp corner).
(I'd put the cutover in the mid-1980s, when a handful of floppies would both be too large to swallow and too light to do much drop damage)