This is basically where I (and I imagine many others) have landed with the telephone. Anyone not in my contacts goes to voice mail. Made my phone usable again.
This certainly helps, but I still get spoofed calls from my bank - and there's legit reasons for my bank to contact me.
still not many are doing it with emails. but great point, tough we all still have to pick unknown calls here and there as we expect someone, so with the email screener it's even better, as each email has a sender.