Well, it's not like we live in a time without analog poly synth options. From DSI there's the Mopho x4, the Rev2, the Prophet-6, and the OB-6. Then there are Korg's Volca Keys, Minilogue and Polylogue, Elektron's Analog Four, Behringer's DeepMind 6 and 12, Modal Electronic's 008, Black Corporation's Deckard's Dream and at some point their PolyKobol replica, and maybe within a year or so Behringer's UB-Xa and Shear Electronics' Relic-6 (though now planned as an 8-voice version). Beyond that, people are free to polychain Sub(sequent) 37s or second-hand Slim Phatty modules or SEMs.
Roland won't do it because they have ACB and no-one left anymore who knows anything about analog circuits, and Yamaha won't care either because they sell more motorbikes in a year than all of the above-mentioned manufacturers sell polyphonic analog synths in more than 10 years.