Using a Roll Up Scale to Get the Current State of a Blotchain

A roll up is just a blotchain, just like any other blo chain with a bridge. Just because it's a roll up doesn't magically mean that users can now no longer need to do those exact same things. Users still need to be able to fully validate the chain, to make sure it's valid. And you can't meter block chains based on the happy case, because that's a grieving factor. You must met them based on worst case, inareo. So this means that you could run an instance of fuel using celestia for data availability and etherium for consensus and a settlement - but not necessarily all at once.