This is debatable. But I guess it's pretty safe to assume that the technician/contributors of the Bitcoin are more far-oriented toward the technical advancements in contrast to UI/UX, given the nature of the Bitcoin core contributors or the community majority are coming from the tech-savvy background.
Yep. The UI/UX improvements job is more on the wallets and layer-2 side rather than the Bitcoin core side. Both parties are doing really important stuff, but in different sectors.
The security and self-custody part made me think that it is related to the whole fully internet space in general. People are using identical passwords across many platforms rather than using any password manager. Not to mention, that a humongous data-gatherers platform is leading in many ways. As a result, people are getting used to using their platforms then didn't blink an eye to adapt or use other privacy or security-oriented platforms. The ignorance part also has a play in part of the migration process tho.
Pretty much. Having all people having to self-custody through private key backups is mostly going to be disastrous. I think it's either some clever developer is going to find an easier way of having backups without sacrificing security, or people simply need to slowly adapt and learn about security.
