What I dislike is that email addresses have become the primary key of online identity. Many services don't even have usernames anymore. I still think that government should furnish something like an online postal address. Protected with gov issued hardware keys (U2F?), white listing for recipients maybe. To be used only for gov business, banking, gas, water, etc. If those things are essential to life, and in turn depend heavily on email (here they do for sure), they should not be handled by fickle Big Tech.