I've had to warranty only a few things over the years.
A dozen or so phillips screwdrivers, mostly #2's, a couple #1's and one #0. 1/2", 5/8", 15/16" wrenches (Always the same thing, hitting them with rubber faced hammer). Ratcheting screwdriver that somehow lost it's magnetism. A handful of sockets; 1/4" drive 5/16 deep, 3/8" drive 1/2" deep, and a few others, all 3/8" and 1/4", never 1/2" drive. Probably another half dozen things that I can't remember, I do remember going to the dealer with warranty stuff occasionally.
I've actually used my Proto tools a lot more than my Snap-on, because I bought them first, when I did more work. I've broken a pretty similar assortment of Proto; several #1 phillips, a 1/2" x 3/8" drive deep socket (same time as the Snap-on one), several 1/4" drive standard sockets, a few 3/8" and 1/2" drive sockets, a brand new 16mm x 1/2" drive socket (first use, obviously bad metal), 1/2" drive u-joint. Don't recall ever breaking a Proto wrench.
I've never broken a Proto or Snap-on ratchet, but have broken numerous Craftsman and cheap ones. Have broken countless Craftsman sockets, usually don't crack but just stretch and slip. My first good tools were Craftsman, and they got used heavily, so they had a lot of chance to break. Have cracked several SK sockets. Every brand of #2 screwdriver strips out sooner or later, most of them sooner. All the Gearwrench stuff I bought broke very quickly, so I stopped buying it very quickly. Haven't bought any more for 15 years after that first experience. Have had several cheap Husky tools from HD break; they were tools of expediency that I had to buy when I was somewhere without tools and needed to do something, and they didn't work very well at all.
Have never broken a Harbor freight tool. Then again, I've never used one except incidentally, the few I have gotten in tool lots and tool box assortments have gone back out the door after just looking at them.