my 2 cents: Reason I don't is perceived reduced reliability (I can't prove anything, could be wrong, examples above of where I am wrong), reduced gas mileage, towing and that the chance of a lift kit allowing larger tires and having my differential lifted 1 - 2 even 3" actually making any difference in snow where I drive is so minimal it doesn't make sense - for me, my situation and the places where I drive, big issue being massive snow drifts. Plus, if I'm using my truck that way - getting farther in in the snow/ruts, etc, I'm thinking I'd need a winch and all the accessories to really make a difference. Not my personal style.
For the money, I'm going to be buying a 4 wheeler or UTV with tracks and a winch. Yes, it's more $ than a lift/tires/etc but I'll actually get all the way to where I'm wanting to go vs. just getting a little farther on a snowed over road.
My good friend, my son in law and his brother in law think I'm nuts. They lift everything they buy 2" or so, put on the bigger tires and have a ball - but still have to deal with deep snow stopping their progress at some point. Their trucks do look a lot better than mine lifted, gotta give them that.
Of course I have to give them crap and ask why they need "compensation" of a lift kit. Leads to good family fun.