Is it..
- The hardware? Because I thought low level hardware was a commodity in this day and age... - The software? - The industrial design of the actual unit? - The cool hip design/marketing/brand?
Multi-engine synths / grooveboxes are getting more common. You see stuff like the Roland SH-4d, or the various options from Elektron. You can combine these things with an ever-increasing selection of pedels. And if you have an iPad, there's all sorts of quirky stuff you can do there.
I honestly don't see why someone would want to create an exact clone of the OP-1. If I made synths, I would want to make something new.
Their PO-2x series, for instance, was designed by Linus Åkesson a.k.a LFT. A lot of his coding and hardware projects have hit the HN front page.
I have a feeling many "serious" studio people scoff at this subculture, especially outside Sweden... But you shouldn't scoff at Sweden when it comes to music production.
Waiting on the Behringer OP-B tho I guess :)