It probably makes sense with a silent linear keyswitch for users who are used to the obvious acoustic feedback of a typewriter.
Since cheap modern MCUs have programmable ADCs, you can wiggle an output pin and experiment with different sounds. I've tried something a bit more "tinkle" like than a flat "beep" and it has its charms, but it could go a whole new place like different tones for special keys (simulating the clunk of a shift or space bar) or even keys that you could subtly differentiate by sound to tell if you're off alignment.
Since cheap modern MCUs have programmable ADCs, you can wiggle an output pin and experiment with different sounds. I've tried something a bit more "tinkle" like than a flat "beep" and it has its charms, but it could go a whole new place like different tones for special keys (simulating the clunk of a shift or space bar) or even keys that you could subtly differentiate by sound to tell if you're off alignment.