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Signal and Threema want nothing to do with WhatsApp
(www.androidpolice.com)
This is a most excellent place for technology news and articles.
This has been my experience as well. In the past friends and family were more reluctant to break away from whatever their default communication app was. These days most people are already familiar with the idea of using one thing to text, another to "message", and often more than that. I've had great success converting people to more secure platforms now that they understand the process.