Imagine if the web was divided that way. We’d have blue web pages that only work on WebKit, and green web pages for which WebKit only supports basic text rendering. And Apple wouldn’t allow linking to a green web page from a blue web page. Or maybe rather, show five security warnings: “Do you really want to visit that unsafe green web page?”
Exactly. FaceTime and iMessage were supposed to be standard. We have standards for these things but nobody will use them. The only reason web pages work is because they were designed back in the days before corporations ruined the internet.