Comment by knocte

The author is just assuming an expiry time of the payment channels of one month, which is not realistic in an hypothetical scenario in which layer2 protocols started to become prevalent in the cryptocurrency space: the more people trust this new software stacks, the longer the expiry times people will give to their deposits, because they will not mind locking money which will be just useful in the Layer2 area, if most of the merchants move to this layer as well, and because the longer your expiry dates are, the less fees (blockchain fees) one will have to pay.