Not trolling at all. I'm totally serious. Although I was certainly aware we'd have some fun debate on the topic. I have no emotional stake in this - just an opinion born of observation and putting in probably north of a hundred days on this class of ski --- although admittedly the quality of my skiing does not correlate as much as I'd like with my quantity of skiing... Which, also admittedly, may influence my opinion... Oh well - my fun factor is right up there! How many days have you been out the past couple months? I've cleared day 7 for my season so far.
As for SJ's & others' take that fully rockered (and usually somewhat fatter) skis can't make for OSQs -- I'm just going to say that some of the senior folks at some of the biggest specialty ski sellers in the US are merrily (and sometimes seemingly quietly) skiing things like Hell Bents and EP Pros as one ski quivers (and heck, even I will agree to ignore the use of Pontoons as such). This includes at least one person I can think of in the NE. And these are folks who can ski literally any ski they want any day of the week. Obviously this is still a relatively small group, but clearly the jury is still out...
If you're already really good, you can ski just about anything in just about any conditions. No question.
Me, personally -- when it starts getting icy, I'm not even really happy with something 78 or 82mm wide. I can't imagine something 100+ would be much fun, at least if I wanted to do anything other than skid helplessly. Maybe on a particularly crappy day this year I'll take out the fattest thing I can find in our rental shop, just for kicks. (Not sure if we'll have the new Mantra/Katana.)
I'm skeptical about how easy it would be to learn on a really wide, soft, and potentially rockered/RC ski. Especially in, um, firmer conditions like you get all the time in the East and Midwest.