[derefr]

It’s not that 3D is un-retro; it’s just a tempting crutch. Give people “free” 3D, even a little, and they’ll use it to the exclusion of interesting 2D effects. You’ll get FF7 instead of Terranigma / Symphony of the Night — still retro, but 1. the wrong era, and 2. not taking any advantage of the distinctive cool stuff the hardware can do, instead looking like every other low-poly 3D game.

Same with bitmap modes: people will use them as a crutch by combining them with software rendering.

(Maybe this could be fixed by putting a hard cap on the 3D frame rate. Maybe even make it so low that all 3D must be precomputed, baked down into a tile map and used through sprites! Under that restriction, it could look arbitrarily good, but the results would still look more SMRPG than Goldeneye.)

And same for sufficiently-good PCM sound. The ideal early-90s sound chip would be something like 128-voice polyphonic MIDI with a huge wavetable (but banked — no playing PCM by walking wavetable samples), passed through an arbitrary FM synth module, with the whole thing being bytecode that can do loops and branching.