The only thing about the ESCOM and QuikPak Amiga 4000Ts that were not great were the floppy drives, which I’m told were modified PC floppy drives. They worked, but weren’t the most reliable either.
Honestly, I’m amazed it took Commodore so long to properly support high density floppies. I’m pretty sure they stuck to the double density 880K GCR format right up to the 4000 series Amiga. Meanwhile, Atari was supporting high density media in some capacity as early as 1990 in their higher end systems.