Literally no one is saying it’s impossible. Of course it’s possible, and it may one day even be economically viable.
But Elon’s claim that by 2027, the cheapest place to put data centers will be in space? Yeah, that’s impossible. But then again, only a fool would believe him at this point.
I highly doubt that space data centers will be more advantageous than terrestrial before 2035, and that’s very optimistic.