If you want to see still living megafauna check out the MuskOx
So far I like it, seems to fill the void left due to the sudden exodus of Wallet of Satoshi from the US market. It's simple enough to use and the swaps between Liquid and Lightning are fairly inexpensive. It does a good job introducing the idea of self custody in a user friendly way to new Bitcoiners too.
Some miners may do so, but I doubt any other participants in the network would favor such an action. The separatist miners would then likely move to mining on a forked chain like we saw in 2018. The original chain would see a drop in hash-power for a little while until new members begin mining on the original chain and bring it back to a happy equilibrium. The new fork will then be forced to compete head to head with the original and lose due to the substantial head start of the original Bitcoin. Most fork miners would then move back to the original or go bankrupt.