What is it that you don't understand?
> Yes, but literally none of them are doing analogue polyphony.
That's simply not true.
Korg Minilogue, Mililogue XD, Prologue, Behringer Pro-800, Sequential Take 5, Prophet Rev2, Prophet-10, Arturia PolyBrute 12, Oberheim OB-X8, Moog One and many more.
Polyphonic analogue synths are popular and very useful actually.
Most of these are either discontinued or some sort of paraphonic and/or hybrid-digital architecture. :)
There's no point in trying to make an analogue synth that mimics the percussive nature of piano.
Synths are much closer to woodwinds.