Windows has always been head-and-shoulders above the Mac and that's why it won the 90s desktop wars and that's why just about every business on earth uses Windows and not Macs.

You are in a tiny minority if you think Mac window and file management are any good. File extensions are the most pragmatic way of dealing with associations and that just about sums up the difference between Mac and Windows: Microsoft made Windows to be practical whereas Apple has always focused on style above all else.