True. But most users don't care either. For the ones who do care, on-chain and lightning capacity is not sufficient but it is > zero.

We'll cross that bridge when we come to it. Not sizing up the blocks in 2017 doesn't mean never making more blockspace. It was about making sure running your own node stayed economical. In 50 years, presumably blocks a bit larger 1vMB won't be something that centralizes bitcoin, especially given that 50 years ago, 1 vMB was 1/10th of a hard drive's capacity. Freaking out about where to fit 8 billion bitcoin users all self custodying right now is like freaking out because of the 2106 issue where unix time runs out of space for nLocktime transactions.