Bear in mind that Lightning is still very much in its infancy. There are a lot of further developments which are in the works which we will hopefully see come to fruition over the coming years, and there will be plenty of more developments which have not yet been thought of.

Touching on darkv0rt3x's point above regarding opening and closing channels - two developments which are currently ongoing are Eltoo and Channel Factories. In short, these would allow multiple users to cooperate to make a single on chain transaction, and then on top of that single transaction open as many payment channels between each other as they like. This would significantly decrease the on chain footprint of Lightning channels.