I know about the Kryoflux, and it seems a pretty cool piece of kit.
But I'd much rather have built-in support for reading floppies, rather than a USB dongle. It all seems a bit too hacky to be "official" with a machine, if you see what I mean.
If you utilize on-board XMOS chip you need additional circuitry.
Plus the Kryoflux people have never shown any interest in the Amiga as any more than a target machine, as far as I know - they want to read Amiga disks, but not on an NG Amiga. I could be wrong on that front, but I've never seen such interest.
I dont understand what you mean here. There is source code and they offered help when I was about to port the software package to MorphOS. Unfortunately I never had time to do it.