I developed widgets for web developers and I had to change it to stop using the 'fixed' positioning anywhere, because iOS is the only browser that interpret it differently on all touch enabled devices. They have many other issues as well. I have to spend half of my time to fix their buggy browser!!!!!!!!! Not even the old internet explorer causes that many issues as safari.
They torpedoed progressive web apps and many important web standards. Why? Just because they want you to use their apple store, where they can take 30% from every transaction without doing anything.
I hope Apple will go bankrupt and stop hurting the web community as they successfully did in the past years.