What's the point anyway? (Whatsapp)

I got my first smartphone around 2013-14 or so, and didn't want to install whatsapp 'cause it wasn't open source and then facebook bought it, so I went "no-go".

searched for alternatives and decided on telegram (yeah, I know), which seemed to be promising. I mean, they had end to end encryption (even if not by default) and had promised to open source the server code (which they never did), the app was open source...
It worked better than linphone, …

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