I used a Roland R8 in the late 80s and loved/hated it for the humanization functions they added to the instrument; it could subtly modify the sound parameters a

I used a Roland R8 in the late 80s and loved/hated it for the humanization functions they added to the instrument; it could subtly modify the sound parameters at each hit to make it sound like it came from a real person hitting a drum or cymbal in different areas, however it lacked the most important one: timing. A human drummer will never be accurate to the millisecond, but rather will apply very small anticipations/delays at each note, with good drummers capable of doing it on purpose within given limits. Adding such a feature would make it sound even more real. Nothing compared to a real drumset played by a real drummer, however: the number of variables is just too high to be accurately emulated by today's technology. AI might help with that, but don't forget about latency: when drumming live, a few milliseconds is already too much delay.