DF0: would then have the equivalent PC0:, DF1: PC1:, DF2: PC2: and DF3: (the fourth floppy drive) PC3:.
The Amiga floppy drives could read double or high density floppies formatted at 720 KB (although in general, DS-HD floppies were unreliable when formatted at low density 720 KB capacity); if one installed high density floppy drives, the MS-DOS FAT driver could read and write 1.44, and up to 2.88 MB MS-DOS, FAT formatted floppies.
no, unless you mean _one_ particular model sold with Amiga 4000 - chinon FZ357A spinning at half the rpm. Amiga doesnt have traditional fdc controller with hardware MFM/NRZI encoder, instead uses part of audio chip for serialization and operates on raw data stream. Problem is Paula can only handle 500Kbit/s, while HD floppies require 1000Kbit/s.
Cancelling AAA was an Ali cost decision, it would probably have been well received releasing AAA even late 90s.
A4000 was a horrible low budget kludge as there was no money for anything 90/91 on.
Besides world moved on, even cheaper Sega Megadrive was better, never mind PlayStation. Then came the revolution, 1997 was the year of real 3D accelerators, Voodoo/Riva 128, 1998 Voodoo2/tnt. Amiga still couldnt muster a doom clone running at 320x240 above 7 fps while PC saw Quake 2, Unreal, half-life, Tribes and Thief.
Engineering was decimated both in manpower and budget by Ali. Morale was wrecked too - lots who weren't pushed just left. I don't know how many were left in engineering, but it wasn't many. It was also Gould/Ali that destroyed the Unix deal with Sun.
AAA was specced 10x or more faster than original chipset, and way overdue. It was meant to land 91/92 of course. I think the reason they looked at RISC 3D was also cost - budget to get AAA to silicon under Ali was never going to happen, so buy in something. It wasn't 3D so I've no idea how it'd compare with voodoo etc.
I mean (:-) Did not remember the model exactly, but as you have done, it is easy enough to find it out thanks to the "Interwebs".
Commodore had a lot of self-imposed issues as well, which you can read about in this series of articles.
It took a while before PC made any financial sense except of course if you had to use applications available only on DOS/Windows.
Yes, the 2000 series (and later) had expansion slots etc. But most people knew the Amiga via the 500, 600 and 1200 keyboard computers.
And even with the expandability, the core magic lived within the custom chipset that basically acted like a second computer.
In comparison, everything but CPU and RAM lived on expansion boards in the PC.
For those into retro computers, you may also be interested in the Sharp X68000. This was first released in 1987, two years after the A1000, and was another leap forward for home computers, the near arcade perfect ports are very impressive considering when it was released. If the Amiga had continued to have a decent R&D budget we could've had something similar in the Amiga line too: https://m.youtube.com/watch?v=TQPt69UCyIA