It's just a talking point. Only about 2x as many people are using it as 3 years ago, and due to being boat-anchored to the molasses slow L1, it would take 75 years, $500,000,000,000 worth of electricity and all the remaining block reward to open a lightning channel for everyone on earth. Even then its quadratic routing complexity would likely render it completely ineffective long before that many people tried to onboard. It's like a Soviet phone line, if you apply now, you might get a channel before you shuffle off this mortal coil.