A bunch of people, especially in sampler-heavy genres of music (it's not my thing, but I understand Wu-Tang Clan's 36 Chambers was made entirely with an Ensoniq EPS - though that was 13-bit, but still.) EPS, E-mu Emax, etc. Low sampling resolution gives any sound a certain grit and character that a lot of people just like. 16-bit is fine for high-fidelity audio reproduction, but in an instrument (as opposed to a playback mechanism) you don't usually want the highest possible precision and lack of tone coloration. Nobody complains because a violin doesn't produce a perfect sawtooth wave.