I disagree with this article.

This is the premise of most of the "experts" and woke crowd.. that everything needs to go over https, ssl, etc. I've always enjoyed this page: http://n-gate.com/software/2017/07/12/0/ or https://archive.ph/Ym7fc

This is often security at the detriment of functionality. It's the https everywhere crowd.

If you need to send something securely, or need privacy don't use it. But the universality of sms is excellent. The same with email. People using Gmail have some nerve complaining that they're offended Google tries to sell them ads for things in their email, dude you're the product..

I've run an ejabberd xmpp server for over 8 years, for friends and family. But it can be finicky, and up until the past few years, finding a client that works well on iOS has been difficult. That being said, I do prefer xmpp. But let's not go overboard here.