While no software is able to use them (new would have to be written), I think implementing HAM10 and some of the other AAA modes would be very interesting because techniques are already available to use those Amiga chipset tricks.
For example imagine a copper with SuperHiRes resolution

AAA one was HiRes only and it would have opened possibilities in video effects that would have made the Amiga lead in a whole bunch of areas back in the day.
Those Commodore management guys were really either completely dumb or sold out to M$.