I made my Dad buy me a 387 math coprocessor when I was in college because I was taking math and physics courses but I bet none of the software I used ever even accessed that chip. It was more about the empty socket on the mobo looking out of place.
Apparently the 87/287/387 weren't that good as a gaming co-pro as the marshaling of the data to/fro from the CPU was too slow. It was a lot better on the 486DX onwards, I guess.
