There is a crusade against the filesystem in general. We should probably go all the way and design an OS that absolutely does not need the concept of files, extensions and directory trees, even for programmers, else we'll have to deal with this UI debate for god knows how long.

Disclaimer: I believe the best UI for a filesystem manager was Windows Explorer 98, the last iteration with perpetual, irrevocable and non exclusive root access, with Norton Commander as its only rival.

From the moment we cared about maintaining our system's safety from the user's "big fingers syndrome", it all went down (starting with hiding file extensions) to the atrocities we now have to deal with. And yes, I put Seven's Explorer in the same basket as Finder and the likes of Nautilus, mostly due to /that/ horrible folder scrolling bug that MS refuses to hotfix.