Pretty sure it's above 99% for me. Email is just a waste of time and a way to get phished these days.

Depends on what you use it for. Out of the last 20 e-mails in my academic inbox, 17 are human-written and the remaining 3 were generated as a result of a human action.

But this is my work mail. There's no "spam" in it, just endless SharePoint and Teams notifications and useless Corp mails.