(Web) developers have gotten lazier and simply don't care anymore. The fact of the matter is that if you don't host your email with one of the big three, some services are probably not working anyway. I'd also like websites to show me things like news and recipes without having them run javascript, but apparently this means I deserve white pages because writing HTML is too much of a hassle for the modern web developer.

It's quite sad to see. It's also the reason I'm using somethingunique@domain.tld;, if cyberstalkers start normalising to a domain, they'll only hurt their own business.

nobody cares, email, along the majority of the internet as "computers talking protocols", is dead. The absolute majority of email is handled by gmail or microsoft, accounting for >80% of MX servers in the wild by the data i had five years back. I'd imagine the share of the duopoly is even larger today, considering how difficult it is to get into inbox these days.

In the linked document they say to only do it with @gmail.com addresses.