Hiding in plain sight - obviously; various versions of the 'real Satoshi' still nothing concrete. I mean I could declare here and now to be the real Satoshi and get away with it right now, and no one will know if it's true or not, after all, it's April fools'.
This is the best identity mixing ever, so the real Satoshi be like, I'm the real Satoshi and we'd all laugh and say, yeah right! But the true litmus must be his bitcoin address and how much is in it, or if that fails, we'll trace his first transaction and if it aligns with the original eureka moment then we know he's the one. So ask Craig or any of the other copies if they've got that evidence.
Oh wait, or has the real Satoshi been found? I've been in delta sleep for no more than 10 years.