In the broad terms, how do you even imagine LN to work? Let's say I want to buy a $3 coffee at some random Starbucks I'm walking by. Do we have to first open and fund the channel? How much will it all cost just for that one off purchase?
Give particular figures please, no vague nonsense I hear all the time.
As for these implementations, I will believe it when I see it. You didn't even try to address the particular issue I mentioned.