My thoughts exactly, especially the 486. It was a good all-rounder, worked well—thoroughly debuged unlike the Pentium—and fast enough to be useful even today for some work.

Also, I'd heard accounts that some influential third parties (companies developing stuff for the military etc.) were still using it long past its used-by date because it was the last of the 86 line whose internals they could fully understand. IBM was second-sourcing it too.

Incidentally, I wonder where those 8088s come from, same for the 8087. Seems someone still makes them.

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Edit: Just occurred to me the main/intended use for this computer is as a training aid. The ready access to the chips and that they've sockets for removal would allow access for an ICE (In Circuit Emulator) bond-out chip/board to be inserted. Thus, there's no need for it to run any faster.