Onboard onboard onboard. Therein lies the death of any expandable computer. Get all that obsoletable stuff OFFboard and now your expandable computer is more future-proof.
Without OS4, even OCS, ECS, and AGA can be a serious burden to those of us with graphic cards!
I had hoped to get a still working A1 for my girlfriend so she could run OS4, since she had so many problems with UAE a la eXPee. Well, now she has a A2000/060/50, which is just fine. Too bad it's turned off 90% of the time and not rendering 24/7! (yet ;-) )