well "who" has been trying to emulate the Saturn? I imagine maybe a couple guys who did on the side as a hobby from scratch. On top of that, this system is somewhat obscure and well over 10 years old now. There's not much incentive to work on the emulator.
I'd imagine that if Sega put together a team of full time-programmers and gave them a couple months to emulate a Saturn, I think they'd be able to do so rather quickly. Not only would they be working on it full time, but they'd have all the prototypes and dev kits that the hobby programmers had to make from scratch.








