Derided by whom? From an end user point of view, Safari is the best browser, hands down, on any platform, by a long shot. Performance, smoothness, battery life, mobile integration, password management, the list goes on. I had to support and still know by heart the bugs and idiosyncrasies of IE 5, 6, 7, 8 etc. I have no sympathy for people who say Safari is the new IE.
It’s also a great Mac app. Open a link in a new tab or window, frontmost or background? What happens by default, what keyboard shortcuts should work in each case? No browser has a better answer to these questions. Also, Cocoa text niceties work as expected. Multi language spelling, dictionary, text to speech… I’m a huge fan, one of the best apps Apple ever made. It made the iPhone possible.
The various Cloniums (Chrome, Edge, etc) are probably second best in this regard with Firefox sadly placing last… Mozilla stuff has always lagged behind in that department. For example, it only got native context menus in the past year or two after the issue sat on the bug tracker for over a decade