[rasz]

>small pockets of Amiga users that could store 1.76mb

realy reaaally tiny fraction of Amigas userbase had access to HD floppy drive only ever shipping in ONE top of the line most expensive model 4000. It was a custom modified Chinon FZ357A spinning at half rpm, needed because Amiga could only handle 250Kbit/s data rate while standard HD floppy drive uses 500Kbit/s. Commodore being hugely mismanaged didnt invest anything in engineering, they lacked will and resources to update technology in its subsequent models. 1994 A4000T, the very last Amiga ever manufactured shipped with the very same Chip responsible for sound and Double Density floppy interfacing as the very first model 1000 from 1985.

> drive was more flexible

Stock Amiga FDD was standard and could be replaced with PC after little pinout modification. Controller on the other hand could be called software defined as it lacked any smarts. It could only decode/encode raw datastream to/from ram buffer whole track at a time. In contrast PC controllers target specific sectors.

Article about playing with stuffing more data on PC floppies https://www.os2museum.com/wp/floppy-capacity-math/