The family connection
There are some that will not move due to family. Large families that are very close tend to cause that effect. Or old parents that require attention due to age and will not move
The generational wealth and business connection
Some bitcoiners are part of generational wealth tied to businesses and properties and therefore moving is not as easy and I many cases neither an option they will consider
As for evolving Bitcoin implementing a BIP that adds privacy in L1, that will solve a critical problem. Now that institutions are in there is not putting the rabbit back in the hat, is done. Regulation will continue, probably western countries will force KYC no matter what, but at least, for the rest of the world, for the libertarians, the transactions will be private in L1. Wishful thinking...
My two sats for what I have observed: