Having 7 different methods to do string interpolation is not "productive and accessible", it's confusing and prone to abuse.
The whole "never break user land/space" axiom that the PHP core used to follow isn't healthy for the language, and I'm glad we're moving away from it.
I want PHP to grow into a more modern and stricter language, and I can understand that iterating fast and deprecating old behavior is part of that evolution.