People will look back at 2020 Blockchain and either say (a) crap, how did we ever get taken in by that, or (b) boy, howdy, do you remember how foolish those people were that thought this stuff was anything but a scam?

There is nothing that can be done on blockchain that cannot be done cheaper, faster, easier, and more securely without blockchain. Blockchain has negative value, and no matter where you measure the start of the Internet from, it had more positive externalities fourteen years on than anything blockchain will ever have, not least because so-called "blockchain" has an insurmountable set of negative externalities that would need to be overcome if a single real-world productive use could be found for it.