Your [2] note about using website names in emails is an awesome but underrated benefit. I’ve been doing that with hey.com email at the moment. (Using a custom domain, any address that doesn’t have an inbox goes into the “catch all” box. I can upgrade an address to a real one by setting up a free alias address which is pretty simple in their UI.)

I’ve only caught one sold email being used for spam so far (sketchy wristwatch store that wanted an email to unlock some discount I never used) but really happy I’ll know about the next one.