Although this is true, it's very easy to become a custodian, you just need a BTCPayServer, I'm already doing it. This solution is not only for uncle Jim, many small custodians may sprout to serve local markets. This is an important issue, as we're never dealing with trustless services, but trust minimized. It could be possible that you personally know the person in charge of your custodial wallet, and this person wouldn't be incentivized to rug you, because for one it's his business to serve as custodian, and two it's just not worthy for a few million sats. I understand that custodial solutions are not ideal, but are they actually that bad? Sometimes I wonder why people coming to bitcoin, go full paranoia, cypher punk, private maximalism... like bruh, a month ago you were using only fiat on a KYC bank, just take it easy and let's go step by step.

On the other hand, one good reason to go forward with drivechains could be to bring together many crypto enthusiasts that are now working in other projects where they can develop things not available now on bitcoin, but as Jimmy Song said, most of the crypto world is there mostly for gambling and degeneracy, not for the tech, drivechains won't bring them back.