Earlier quoted context omitted.
I wish the EU would force messaging systems to also support interactions with XMPP or other similar open standards. There's nothing in their way to expect such a thing, except the lobbyists.
Why would you want your government to mandate how technology works? Sounds like a recipe for disaster and the perfect way to stifle innovation
Forcing a specific standard is problematic, but it would be reasonable to ask any communication service to provide a fully documented and public API with features and access equal to the features and access of the official application.
Random nerds make integrations to whatever application/protocol is in vogue, business still gets to have complete freedom in where their take their API and thus their product.
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I would even go as far as to say that every web-service should be machine-consumable in that fashion, but that's beyond the point.