All the LCC like Jet Blue, Spirit, and even Southwest cannot and will not be able to continue to operate in big airports because the cities like Boston, LAX, ATL are making it to expensive, for them to operate in. Just look now Southwest is shrinking the Atlanta base and its flying. Southwest carved out its niche by flying in and out of outlying airports were they could turn the airplanes fast and with less people on the ground. It saved money and made them lots of money. No amount of premium seating is going to fix the problem of the expense to fly in and out of these larger cities. Southwest needs to get back to their old ways, and not be like an American, United, or Delta, who all came through bankrupty to get were they are today. Once all the LCC pull out of the larger cities, the cost will rise even more for the legacy carriers and they will start feeling the pressure, while the legacy's are charging all their useless fees, the LCC can get back to concetrating on low fares and making money again. Southwest does not even have the lowest fares anymore and they are still struggling to get their foot hold after the pandemic, and they may never get it back, considering this Elliot group will start picking them clean soon.