so what exactly was going to cause frame skipping
I wouldn't know, not having seen any of your Amiga games. I was criticising the use of delta timing in 2D games in general, because I was asked to elaborate on my opinion. That doesn't mean I think it was common (it's not going to be common on fixed hardware platforms for obvious reasons) and it certainly doesn't mean I was criticising certain forumites' games on certain Commodore machines without ever having looked at them (which would be silly). Just so we're cool, like.
But just in case anyone's ever tempted, I have a GX4000 and a copy of Burning (sorry, "Burnin'") Rubber ready and waiting. Don't risk it.