[FabHK]

That is not accurate, as far as I understand. The opposite might even be the case.

From what I understand, the battery is damaged most when close to 0% or close to 100%.

So, if a phone could do, say, 1000 full cycles until the battery reaches a certain stage of degradation, and now you used an identical phone, but with shorter cycles only down to 20%, then charge to 80%, you could not only do 1000 of those short cycles, but even 1000/60% = 1667, and still have the battery in a better shape than the one with 1000 full cycles.

I am not certain about this, though.