Phone numbers make sense for quick onboarding, but for multiple numbers, identities, it all becomes a mess. I am not even that interested in having a fixed pho

Phone numbers make sense for quick onboarding, but for multiple numbers, identities, it all becomes a mess. I am not even that interested in having a fixed phone number, I would rather ever changing throwaways for many contacts. As soon as my number gets into the wrong hands, the fight against spam is painful, and I have to drop it.