Boring or not Mayweather doesn't just run and tire guys out, he has the reflexes of a cat and he can maneuver his defensive shell to where he's only taking punches off his arms and gloves while he's landing flush shots on his opponent all night, it takes the wind out of your sails as a fighter when you're only hitting an arm or glove or worse yet air, nothing more tiring for a boxer than swinging at the air in a fight, McGregor will experience frustration like he never has before.