I'm not interested in spending a ton of time on this, but I did go and watch this short interview with him about scaling misconceptions.

Wasn't convincing at all. For one, the guy comes across as kind of dishonest. Not scammer-level dishonest, but more like a politician. The main thing though is that he's just a big-blocker, which is just a total dead end. Having everyone store every single transaction that was ever made until the end of time is just not realistic.

In order to scale to any globally significant number of users, a cryptocurrency needs a second layer to aggregate transactions, such as Lightning. Monero seems to have nothing in this regard beyond "However, academic and industry research is ongoing and promising in this area."

they are a hell of a lot smarter than me

You should not be investing money in something based on this level of understanding, and you *definitely* should not be advocating it to others. Scaling is an existential problem for cryptocurrencies. Their utility is based on their monetary value, and their monetary value is based on investor assessment of their future utility. Without the ability to scale, there will be no growth in utility, which means no investment other than temporary dumb money, which becomes a vicious cycle.