I think it’s a bit weird to be drawing comparisons between #Safari and #InternetExplorer. Safari doesn’t and likely will never have the web browser market share and thus complete dominance that IE had. Its market share is tiny in comparison. A better comparison would be the #Chrome browser and the engine itself built on (yes it’s important to include the engine too) and you’ll see that Google’s dominance is more far reaching than Safari on iOS and is probably on the same level as IE back in the day at this point.
The “browser choice” warriors love to focus on iOS and ignore the bigger issue of the dominance of the #Chromium engine in the wider web browser market. All it’s doing is handing the keys of the web over to Google.
