> Are there any popular old computers (Commodore, Amiga, Mac etc) that used a 5¼" drive? My impression is everything was on cassette, until 90mm drives became c

> Are there any popular old computers (Commodore, Amiga, Mac etc) that used a 5¼" drive? My impression is everything was on cassette, until 90mm drives became cheap enough for home use. Your impression is very much mistaken. The Commodore 64 and Apple // were both equipped with 5 1/4" drives quite frequently, as were the Atari 400/800, the Tandy CoCo, etc. The TI 99/4A was usually found with cartridges and tapes, but could be equipped with a peripheral expansion box including a 5 1/4" drive. Anecdotally as a kid growing up in the 80s, 5 1/4"s were everywhere and I didn't see my first 90mm disk until years later.