> 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.
So the managers also demand their employees don't use it you mean? Because then it can be used against them in court? (cfr. email "retention policies" legal departments demand these days?)
And they'll keep doing what Boris Johnson was doing when in power: https://www.standard.co.uk/news/politics/boris-johnson-covid...
They'll do it anyway.