Lovin' the ronniecoleman tag... YEAH BUDDAY! BOOOOM!
I stopped wearing a belt about 2 years ago, when I decided to stop competing in Strongman and focus more on the quick lifts as well as highland games throwing. Since I can't wear a belt in those lifts (too restrictive), I decided that I would ultimately "practice how I play" and ditch the belt.
My "strength" lifts (squat/dead) went down, but my quick lifts went up because I was no longer using a belt for my supporting lifts.
Every once in awhile I get a little nostalgic for accessory backwork such as heavy shrugs, and I will wear a belt for those as I tend to go pretty heavy on them, and because of that there is significant room for error. But for my pulls, my squats, my cleans and snatches, I'm beltless and happy.
Two weeks ago I walked 80 feet with a 700lbs superyoke when deciding to train with some of my old strongman pals. I wore shorts, t-shirt, and vibrams. It was much more challenging than when I used to wear a rehband neoprene back brace with a big heavy inzer belt over it, knee sleeves, hightop vans laced so tight my toes were numb, etc... but I know I'm MUCH stronger now... there is no way I could have hit 700 without a belt even when I was regularly going 900+lbs in that event with all the equipment.