Well they did go adult size with the Prologue.
Yes, I expected someone would say that. At first, I was excited about them, but the Prologues now seem like cheap Prophet Rev2s. Sure, they have some obvious additional features, but also a pitiful paucity of modulation. On the Sweetwater Specs page, they don't even mention modulation! Nor have I been impressed with their general tone. Nor is there a module version. And I've also read about serious tuning problems in quite a few units. I quickly crossed the Prologues off my list.
Besides, isn't the digital oscillator still under development? I prefer completed instruments that can be fully assessed before purchased. That's one of the reasons I wait for Sequential to finish their OS updates before buying one of their synthesizers. I'm still patiently waiting for the Rev2 to reach its "perfect" state.