@QuentinMann It would probably be messy. But do we live in a simulation? I'll wait here for evidence. Meanwhile, I'll chillax and try to fix the world I know exists =)
You are right though, I should have specified: being a rationalist atheist is relaxing =D
@arteteco For me it would be, simply by using the argument of how likely is it we would be the first to do it? I know it's a judgement call, but I highly doubt we would be the first. But as @freemo says, it all depends on the laws of physics in whichever multiverse you're in too.
We could be living in simulated multiverses inside simulated multiverses - and if the 'Many Worlds' interpretation of QM holds true, that's an impossible onion to unravel! :)
@QuentinMann Just because this universe may make it difficult or even impossible to create sentient beings inside of it doesnt mean or even imply that the universe we may be hosted in has the same rules. The physical laws of our host universe may very well make the creation of such simulations trivial.