The ability to make consistently great short SL turns, no matter the terrain or conditions, is a true benchmark of skier skill. Medium to long radius turns provide more time to get things right and are therefore a bit more forgiving of technique problems. However, it is quite common to still see a lot of "park-n-ride" going on in skiers who think they are making great longer radius turns.
Back on topic - I also agree that skis have gone far too wide for most skiers real needs as daily drivers. I think that we will see a bit of a backlash from consumers and eventually some manufacturers will come around and bring back more narrower skis. For me I've settled on the 3 ski quiver (70s, 90s, 110s), but I still have a bunch of stuff that falls in between. Even with last season's great snow I spent most of my time (>80%) on skis that were 92mm underfoot or less (with much of my time spent on a 76mm). I find it hard to believe that there's really anyone that should call a ski that's over 100mm wide their daily driver for resort skiing. A ski that wide requires too much of a compromise unless there's a good amount of fresh snow.