Please tell that to the multi-billion dollar company I'm currently working to integrate with that decided 2016 was a good year to implement a brand new SOAP API.
I don't think so. Can you back it up with facts?
Since you haven't demonstrated your premise beyond talking about what you personally prefer, that particular ball is still in your court. The world isn't obliged to accept your unsupported opinions as truth until you're convinced otherwise.
I don't need to demonstrate anything. It is not de facto standard since if it were everybody were using it which is not the case (Google is the best example). Look up what the term means and you will understand.