On the other hand, I've also heard that threshold workouts are better because people don't even get near to maximal exertion (certainly not "110%"). We consistently overestimate how much effort we put in.

So, a 60% workout every day is better than the "high intensity" workout a few times per week that actually just clocks in at 75% effort.

Just another reason to stick to daily consistency, and not the only reason.