It was a joke. OTOH lightning is IMHO a joke as well, for many reasons. Funds need to be tied up, nodes generally need to be online, routing is a (mathematical

It was a joke. OTOH lightning is IMHO a joke as well, for many reasons. Funds need to be tied up, nodes generally need to be online, routing is a (mathematically) hard issue, and the channel open and close transactions (or 'add funds') would certainly become an issue on the main chain if lightning became popular.