Earlier quoted context omitted.
Additionally, Safari at least has the fundamentals in place — IE couldn’t even render transparent PNGs properly without Windows-specific filter trickery until around version 9 or so which was released in 2011, around a decade after Gecko based browsers, WebKit-based browsers, and even Microsoft’s own Tasman-based IE for Mac did.
People are quick to forget the pain of things like table-based-layout. I’ll never forget in 2006-2008-ish I developed a website for my computer repair business (I was in High School) and was very proud of it. Then I opened it in IE (I had developed it in Firefox) and it all fell apart (I was using floats IIRC). I then rewrote the whole thing using tables because I knew my target audience would not be running Firefox.…
Safari is fine in comparison.