It's easy to be critical of the absurd number of re-issues out there, but Roman does choose interesting things to bring back to life. I can't say enough good things about the Sputnik Dual Oscillator, except that I'm disappointed he let Sputnik go. I understand it, though, as Sputnik was sort of tied down to the old Buchla aesthetic and circuitry, and he clearly wanted to branch out from that.
(Incidentally, for anybody who might be worried about getting orphaned Sputnik modules serviced, they were designed by Roman, but built at Darkplace Manufacturing in Portland; and Darkplace will get your Sputnik stuff spiffed up at a reasonable price.)