3D was CPU intensive. The amiga was never just about the CPU,
Maybe not "just" but in the mid / late 90's it was getting tiresome to have my acclerated Amiga 1200 switched on through out the night rendering the most a simple low resolution animation in Imagine. Boy, I wanted a "fast/faster" Amiga back then. I really started to feel back then how Amiga was not going to go anywhere at that time with all the promises hopes and so on.