Bitcoin Core

The default setting, as you said, is assume valid is on. So basically up to a certain, then your Bitcoin node is only checking the signatures from that point forward. But I think the question is more about the increased download and the compute aspect. It'd be pretty odd if we started getting for like, so the doubling that you're referring to is if you had blocks that were essentially nothing but inscriptions that were all witness data. If every person making inscriptions is willing to pay to get into blocks more than every financial user of Bitcoin, that would be a very weird outcome.