This is obviously a problem if you expect small or even medium-sized transactions to be recorded on the blockchain itself. It's less obviously a problem if the

This is obviously a problem if you expect small or even medium-sized transactions to be recorded on the blockchain itself. It's less obviously a problem if the blockchain is able to function as a "trust anchor" for additional protocol "layers", e.x. Lightning Network. TBD whether that actually works in practice at scale, but I believe it's Bitcoin's only hope.