looks like keyboard could be relatively easily substituted with a controller using midi.
agreed, about OP-1 , I see no reason to play off of TE reputation - when they could easily come up with something new - just feels wrong and lacking imagination. also I think it will be a ‘rod for their own back’, it will get accusations of not sounding like the OP-1, not having x, y, z… by TE users defending their machines.
surely, much easier to be new/unique, create your own reputation… if they are going to pull this off, then they certainly have the skills to do something new.