I hate SMS 2FA because of roaming: I'm from one EU country that lives in another EU country. I still have my origin country sim, but it's a prepaid that I can top-up twice per year to keep alive (but because it's prepaid, I can't use roaming with it unless I buy the most expensive option and if I go back to origin country something like once every 2 months). Now I need SMS 2FA for certain services in origin country, and those services don't allow any other numbers outside of the country (why I still keep the number to use when I travel back to origin country) or any other type of 2FA. So basically phone 2FA is useless and a blocker.
