This is the problem though. SMS was pushed early on since it was great way to identify and track users in addition to being easy for most of them to use. It was never as good of a choice as TOTP, but it was easier to get users to use. But now there is of momentum behind SMS and sporadic support of things like TOTP.
Most of the new alternatives seem focused on pushing lock-in traps and are complicated for users to understand or use. If they're going to lose user tracking of the phone number they want something even worse to replace it, not something open like TOTP.
Most of the new alternatives seem focused on pushing lock-in traps and are complicated for users to understand or use. If they're going to lose user tracking of the phone number they want something even worse to replace it, not something open like TOTP.