Airline passengers will show up earlier, and stay longer (and eat more) at airport lounges than you expect when there’s a great lounge option at no added cost. And that’s true even when you expect that they’ll show up earlier, stay longer, and eat more.
So even as these lounges have expanded, and Capital One and Chase have both gotten into the airport lounge game, there’s just not enough space for the passengers who want to use these lounges.