Currently Delta and United allow close to 400 large RJs. Don't forget the United is just ramping up their 76 seat market while parking 50 seaters and the bulk of them are at SKW inc. Delta is adding the last 76 seaters, but by 202 a lot of the current 76 seaters will be close to 15 years old and all of these airplanes are replacements. Inc just bought airplanes that are likely to replace the 700+ it operates today.