Email is still the running blood of the internet. While we mostly get away with Slack and others for in-group communication, anything going outside, especially to customers, still goes through emails.
At that scale, expecting a core issue to be quickly (or ever) fixed is just unrealistic. I honestly wonder if fundamentally it will ever be fixed, or if instead we get a different communication path to cover the specific use cases we do care about security.
PS: the phone is now 2 century olds, and we sure couldn't solve scamming issues...
