The "soon" has to be interpreted in a political context, so we're likely talking a few years. FAANG will put their lobbyists on overdrive to get extensions to whichever cut-off date is approved.

The primary feature will be end to end decryption.

Yep, because we have absolutely no way to do e2e encryption without closed protocols like GPG.

Okay sure but how do you reckon Signal to Messenger is gonna work? Not gonna be E2E that’s for sure. It’s gonna be “this chat will be unencrypted because one or more parties doesn’t support E2E.”