Well my 2 cents. I thought I'd never convert to fats, but the more I ski the more I realize the stable platform under the base of my foot allows me to have an awful lot of fun on my skis. Jumping taking a little air and high speed turns feel so much more comfortable with that wide platform under my foot and , guess what, I'm not a spring chicken. I'm in my 50's also. And guess what, I teach skiing in Ontario! Even in Ontario if there is softer groomed corduroy I love playing in my wider skis but they are not my everyday choice and shouldn't be, but mid fats, sure. I do feel a little torque when i get them over on edge and move back to the next edge but they are stable and my head great joy do perform, though I have to remember to keep my feet wide enough to give them room to get on edge. Noticed that in session last year. Typically I do use my slalom skis in Ontario and Quebec is a mix. Why? They do well on the short hills, no doubt, racing and carving is the most fun I can have in Ontario on short hills and all these reasons make them a good fit, but I do pull out my wide ones and have fun on them, especially if we are doing a park session, it's my johnny 94's all the way, the twin tips and 94 mm waist are just nice for landing.
I do recommend a wider intermediate ski (not powder wide but 80's is good) so the skier feels the stable base of support and through that is less timid. The newer wide skis turn so easy with their traditional camber but early rise or softer tips to initiate and these are so much shorter than old straight skis we learned on.
What level of skier am I? I don't really get what all these level 7, level 6, level 9 means. I don't like to refer to myself as an expert but last season I did pass my Level 3 CSIA, for what ever that is worth to anyone.
When I taught west 3 years ago I brought a Head Monster 78 (which I use as my daily teach ski in Ontario) and Johnny 94. Head always seems to offer me the deal, so yea you'll notice I mention a lot of head skis, but my race ski is a Dynastar Contact.
Now I was sure I'd teach on those Monster 78's. I was wrong, I put them on one morning when the snow was a little hard and we hadn't had the any fresh stuff for a week and I hated them, switched out for my Johnny 94.s. The narrow ski didn't feel stable on the long fast runs, it was squirrely, the other turns on demand and feels so solid. A great all mountain ski for the big hills. Slalom skis out west have totally lost their interest for me. Too many turns too squirrely on long cat tracks that need a flat stable ski. I spent two month's at Snowbird with friends who invited me to ski with them in 2014 and one day I put on my slalom's in the spring freeze. Hmm, again, they were off after 2 runs. My friend had tried his volkl Mantra's and neither was perfect but that wide stable, non squirreley platform under my foot won and the Johnny 94's were back on my feet.
The wide skis are liked for a reason. My favorite ski now is my Head Great Joy (98 mm under foot). I felt pretty strange when I put them on in Ontario and I agree they are more a western ski or larger hill with anything from hard pack groomed corduroy to fresh powder over a base. Again the traditional camber allows them to bite and edge when properly initiated for the ski style, and they are stable, light weight and turn super fast with a 11 to 15 meter radius depending on the length purchased. Today's fat skis are not yesterday's fat skis. They have also made big improvements and are not as hard on the joints. They are possibly more tiring on the joints, I do notice the torque at times when I really get them over on edge, but, whipping back and fourth on a race course in my slaloms is still more torque than free skiing on my stable base.
As for my love of a traditional camber, I just find that the push to initiate the turn starts itself with that camber. Where I found the full rocker and reverse camber very useful was in Spring crud, heavy snow, when Cat Skiing tail guide it was very evident that these managed to turn with much less effort and get on top of the snow easier than any width with a traditional camber, so each has a place I have witnessed and much will be personal preference. I don't like to tell someone what they like isn't right. If they love the feel and like it, it must be good for them and they want to work with it. But across the board, I like the mid width skis for most in on piste conditions unless they are racing.
Now it sure is difficult to find a new race carver though........I could use that.