I've always wondered why in MMA one or two punches is often enough to knock an opponent out, but in boxing many vicious blows are exchanged over several rounds.
Is it purely because of the gloves, or what?
Could be the gloves but my guess is that boxers, far more so than MMA fighters, guard their chins like their daughter's pussy. Look at a traditional boxers stance compared to MMA and how they hold their hands when in tight or up against the ropes. Chin down, gloves (much bigger and softer than MMA gloves) held tight against their chin.
You can't get away with that in MMA because of take downs as well as lower body strikes.
I've been so often hearing about how MMA fighters have weak chins compared to boxers. Not so. Their chins are any weaker or stronger than anybody else in any sport. They just have a lot more of their body to protect.