> organizations make their own messenger, and the fact that these organizations then have control over their own messenger ... means their employees won't use it
Legally mandate its use for official communications.
Legally mandate its use for official communications.
They'll do it anyway.
Because, yes, in democracies we have public records laws.
Which means in practice the state (police, Tax service, ministries, ...) get to do any discovery they want, including things that would never fly in the US (e.g. have you ever known a judge to allow discovery on a bank account and blocking it for the duration of the case?) And in private cases, usually there is very limited discovery, and only by an independent lawyer, not on either side, assigned by the judge.
It's very different, with different pros and cons. Given that large companies keep leaving the EU, and I bet this is a (granted, minor) factor in that.