The hardware is evidently capable of running all of this. However, I believe that the algorithmic side wasn't fully fleshed out at that time. I'm not going to s

The hardware is evidently capable of running all of this. However, I believe that the algorithmic side wasn't fully fleshed out at that time. I'm not going to sift through old computer graphics papers, but the Amiga 500 came out at a time when real time 3D was still making baby steps, more or less. It just took a few more years until the academic research was put together into engines that could render nicely textured 3D environments on home computers. By the time that happened, there was no more economic incentive to optimize super hard for a platform that was already dying.