The advantages of bibshorts are that they hold your equpiment more snugly, they don’t have a waist strap and thus don’t chafe around the waste, and when the back of your jersey rides up, they keep you covered, so you don’t get a thin tanned stripe across your low back. Not to mention they’re much more comfortable. The only slight disadvantage comes when taking pee breaks, but most of them, you can leave the straps up, and just yank down the front low enough to whip it out and take a leak. Now if the kids had to swim, that would be more of an ordeal.
I may be the only dissenter here, but i prefer my bibshorts on hot days, I’ve got specialized ones at the moment with meshy straps and I find them cooler on hot days than any of my regular cycling shorts or tri shorts. I’ll have to see how our MS Tina ones are when they come in next week.