all that with 1 comment.... this is just a mixture of existing stuff they've already been doing. Its built on their "poly D" chassis which is in itself a moog voiced mono/poly rip off, 4 paraphonic oscillators? yup. I want to say that korg used CEM oscillator chips in this one (which they already reissue as cool audio) and I think it shares the SSM ladder filter chip of the poly6 (which they might reissue too, I forget). So not a lot of R&D here. It should be hella cheap. That said I've enver been a big fan of the mono/poly. It sounds good but I'm not a big paraphonic fan (although for the 200 bucks t cost me I don't know why people hate on the poly800 so much, served me well for years til I sold it)... and then the unison sound? Its cool but I tend to want odd numbers of oscillators, I dunno, its neat. I can just tell why Uli picked this one. No R&D needed apart from some gains taging and power supply mods to thepolyD. Now a poly6? That I'd talk about. Its such a specific sound and limited engine that the asking prices are ridiculous, but man does it sound good. If I could get one for udner a rgand? Uli you get my money. Just don't fuck it up like the junomind.
Re: paraphony: For me, Mono/Poly has always just been a funky 4-osc monosynth that's thicker than most anything Roland produced in that era, but, sonically, it still isn't a full-on American bruiser like a Moog or Arp. For chords, I'd still use a polysnyth 99% of the time.
Re: R&D... I have no idea what goes on inside of Behringer HQ, but in general, it's not beyond the realm of possibility that the platform their Monopoly is using was originally concieved of for Monopoly, or some other yet-to-be-announced synth, but the Poly D productization of that platform just ended up crossing the finish line before the others... it happens. Order of release doesn't always = originally intended release order... the fact that it's the same chassis isn't a turn off for me, that's just efficient product planning.
Controversy aside, Behringer undoubtedly has some very competent and dedicated Engineers working on these products, and getting any product out the door, regardless of how similar it is to an existing one, is not something I'd describe as easy... but I agree that, in terms of relative effort, R&D for a project that's essentially "clone this old synth, but cost-reduce with modern tech and manufacturing where possible" is gonna be a smaller expenditure than a wholy new synth from the ground up... I doubt they'd have greenlit the clone if someone wasn't already making new & viable versions of Mono/Poly's curtis chips (I think you're right re: original Mono/Poly using Curtis 2033 & 2044)... and synth nerds like me would be suspicious if a curtis-based synth like this was cloned using an enterely different approach for VCO/VCF.
Anyway... either the end product sounds great or it doesn't, we both know nobody will care how much or little effort went into it in the long run. If pedal companies can get away with charging $$$ for minor tweaks to 50 year old analog designs they themselves didn't originate... IDK... seems like some aspects of Behringer's MusicTribe approach will become normalized within the marketplace over time, even if there are other aspects beyond the tech itself that merit ongoing debate.