Earlier quoted context omitted.
Safari is a terrible, Apple-like version of WebKit. The last viable windows version of Safari was abandoned 8 years ago, so please nobody use this browser.
Safari is the fastest browser I've ever used on mobile. It also supports ad blocking. Calling it "terrible" simply does not resonate with me. Chrome is slower and Firefox on mobile is a joke.
A couple issues with Safari I've seen since it's slower to adopt web standards:
- buggier websites from devs who don't have iPhones. Since there are some quirky inconsistencies with how webkit handles css vs other browser rendering engines it's easy not to catch those quirks if you don't have an iPhone to check them with. And once users point them out, it's a pain to fix without a physical device.
- a smaller web feature set than chrome/Firefox. For instance, Safari doesn't allow localstorage while in incognito. I think it supports serviceworkers and webrtc now but it took years to get them.