I never said that semi-autos don't jam. You said that revolvers never jam, and I was expressing my disagreement with that blanket statement.
I've gone through tens of thousands of rounds over the last 25 years, in both semi-auto and revolver, and have experienced all sorts of jams. I'm not saying semi-autos don't jam, I'm just saying that revolvers jam too. Definitely not as often as a semi-auto, but when they do jam, it's generally not something you can quickly clear.
I can say that I have never had a revolver jam. I have had semi-auto shotguns jam, an MP-5 jam, AR-15 Jam, and almost EVERY auto pistol jam. It isn’t often, but it is inevitable.