The idea that Safari is lagging behind is nonsense too. People live in their own fantasies. Press someone to explain what bugs or missing features they're specifically saying are holding the web back and you will probably get a very short list of nonstandard or experimental APIs like WebUSB.
I will say that if you've spent any time trying to develop a web-based app it becomes painfully obvious that Apple is doing the absolute bare minimum to support the browser on iOS. PWAs are barely functional.
