We live in a time where platforms no longer matter Safari runs only on Apple's two operating systems, thus it is as irrelevant as Microsoft Internet Explorer which only runs on Microsoft platforms.
Despite even running my own embedded Linux (T2) I'm using Safari mostly 98% of my time now, ... why bother with Chrome or Firefox on OSX when Safari just works, is snappy, and so nicely integrated, ... I do not even want other browsers to mess (clutter) my system, ...