I mean, yeah, it is “beyond the current state of the art”. That’s the whole point of the thing. Landing rockets on a ship was that too, and yet here we are - the state of the art changed. One thing I heard from people who work there: Musk is super serious about this, so if a thing is not usable in the Mars project - it doesn’t get done. Which tells me that the usual Muskian thing will happen: it’ll take 2-3x as long as he claims, but it will ultimately be successful