I don't miss IE 4/5/6 [etc subversion hell]. Supporting these tripled the time it took to build any site for WWW. Pick any w3C standard: some chance it work

I don't miss IE 4/5/6 [etc subversion hell]. Supporting these tripled the time it took to build any site for WWW. Pick any w3C standard: some chance it worked - on one of the browsers but not others. Some chance each had entirely incompatible workarounds. Documentation? Good luck. What did exist tended to deny html standards other than their own existed so they didn't even give any clue how to solve this. Had to support them, never enjoyed it. There was nothing fun or rewarding about supporting any of them.