Too late for that :-). But good example: gmail is gatekeeper for “deliverability”. EEE doesn’t have to be a malicious conspiracy. It can happen as an emergent property of consolidation.

There are also an increasing number of email clients that are “gmail only.”

Interesting. Especially so considering that the Gmail app on mobile is not gmail-only!

It would have been a great idea in the beginning, yes, absolutely. It's too late now though.