> the first "3D accelerators" were in the late 90s.
You forgot about SGI and I'm sure a few others like Intergraph who were doing dedicated 3D video pipelines in hardware starting in the in the 80's.
Actually the Amiga had a GPU for 2D graphics. You need a Amiga desktop model and not a A500. The graphics shop down the road had a dozen Amigas with these cards for rendering and even ray tracing. They were pretty amazing. Even Disney used them for Beauty and the Beast and other animation at the time.