A lot of it is based in the "data center in space" idea, which is entirely unproven.

I think spelling it fElon is more readable :)

I'm talking about rapid reusability of both stages. With Falcon 9, only the booster gets reused.

The record is up to 36!

I could see the Starship story playing out like the ramp up to Falcon 9 first stage reuse, where they start with a few launches per booster with significant refurb time, then keep making block upgrades to speed it up and extend the lifespan.

It was called transpirational cooling and it would have required 50kg/s of coolant for 5+ minutes of reentry heating i.e. 15 000 kg of spare methane or water which acts as dead weight that could have been payload. An ablative heat shield literally weighs half that at least not counting the transpirational piping and pumps and sensors .etc that balloon the 15 tons even higher.

There's a reason NASA and the USSR never seriously considered actively cooled heat shields and instead let ablation do the cooling.