This is actually the soundest proposal I've read in days (although bitcoin core developers cannot really take any action themselves at this point, or they will be attacked from all sides by the press and "youtubers". Just look at what happened with dashjr's comment if you don't believe me.)

The only question remaining is... how? The only way I'm thinking it can be done is, to create a new hype technology? I mean, if Casey Rodarmor was able to ignite it by himself, any developer with modest bitcoin knowledge can.

However, it appeals to me that FedEx'ing all the BRC20 tokens to a sidechain is the best approach (this will allow us to make claims such as "more scalability and thus more tokens", and as a result boot them off mainnet and onto a sidechain.

Even better:

Instead of a sidechain, some crank can make these tokens on testnet3 (despite testnet being only intended for testing, but do you really think these guys will read the fine print anyway?), and testnet3 gets all the traffic instead of Bitcoin. This is something that can be done immediately right now, by some random guy on Twitter.

At least it will give the bitcoin protocol developers a compelling excuse to launch testnet4