Out of curiosity, what would happen if somebody were to remove their regular agnus from their A2000 and install the Agnus from the A3000? Would that work, or would it crash the machine? Thanks.
It would not work.
FYI there is a slim chance doing so might even break the motherboard and/or the Agnus chip as the pinout of the two chips is different, if power and ground are switched then bang, magic smoke.