The spec for at least one MS-Word format is open, too, but that does not mean I would like for every email sent to me through gmail to be in that format.

I interpret this announcement from Google as a sign that the default format for emails sent from gmail, which is now basically plain text (and HTML via MIME's multipart/alternative) will some day, when Google is ready, change to some complicated thing that requires the user to consent to Javascript's running on his machine before he can view his message, same as it is now for web pages.

It would be prohibitively tedious for me to persuade everyone who send me email through gmail to go into gmail's settings and switch the format back to plain text. And even if I succeed, Google has at its disposal various dark patterns, e.g., resetting the setting back to AMP every now and then (which please note would not be noticeable by the sender unless I tell him).

But sadly that doc format cannot be opened reliably.

I guess not everyone is having tens on gigabytes for 5€ like me, but hell, even if the megabyte is more expensive than gold in some fucked up economy does that mean everyone should sell their soul to google and the likes?

1.Everyone need not sell their soul to Google but the majority did it 2. The same argument stands for Facebook. I wish there was a neutral platform but... 3. I wish someone like apple will take on AMP or search or cloud storage or cross-platform email but apple is interested in keeping people locked. Heck, I can't reliably find a client for pics, calendar except iOS or macos device...

That's ridiculous. You can build non-bloated websites without using AMP. Web developers are just trash.