@ Greg the Canuck
Hi, nice day eh? Tuesday morning, anyhow.
What they should do is make a card with multiple chips on it, then just pick (in SW) the one you want to use.
Put the Fatter Agnus (make a 32 or 64 or 128 meg chip ram version), and AGA (32 chip+) on there for absolute backwards compatability. Then, make a custom, or select a current, maybe the Ti4600, for 3d. But, whatever they choose as the 3d chip. Make a commitment to ONLY USE IT for 3 or 4 years, not keep using a different one every 4 or 5 months. Then, software that is written will run, just about identically, on any Amiga.
BTW: Same goes for sound.
Amiga! We need a standard, so we should use the best one, AOS 4.0!