In that way we could then call PPG Wave, Prophet VS, Korg DW's, Kawai K1, K3 synths "sample playback machines" too. They all use sampled waveforms for the oscillators. M1 has usual suspects single cycle waveforms and DWGS from Korg DW8000.
Right and O1/w series was no better. Those are all filter controls you got.
I wouldn't call it a bad sounding at all, it's no worse than the original, if you like the digital-ish sounds of that era and you can definitely get them here. The filter has a switch to turn off the resonance to get it close to original.