That being said, what do we need to be able to easily use 1.44MB floppy drives for both 880K and 1.76MB floppies? A new controller? I'd like to see some hardware that doesn't simply assume I am creating ADFs or IPFs or whatever the other formats are. If this USB thing doesn't work I'll throw it in my Ryzen which doesn't have a FDD header on the motherboard.

Ideal world, and I know the USB/Subway thing won't work since it isn't there on cold startup, I would like to see some adapter for internal Amigas that mates with modern floppy drives and translates the data to the Amiga as though it were reading DF0 or DF1.

I'm sure if it were this simple, however, it would have been done already.

no luck with Amiga FFS 1.76MB HD floppies.

Of course this won't work. Modern standard floppy controllers can only read/write 720K or 1440K floppies. You can access 720K or 1440K FFS disks as made by Amithlon or AmigaOne, but never ever 880K or 1760K disks. For that you'd need a custom controller like Kryoflux or Catweasel.