I beg to differ! Airlines have slowly crammed in more and more seats for years.
"Less legroom is now the industry norm. In the early-2000s, rows in economy used to be 34 inches (86 centimeters) to 35 inches apart; now 30 to 31 inches is typical, though 28 inches can be found on short flights, according to Washington D.C.-based advocacy group Flyers Rights. Seats have narrowed, too, from about 18.5 inches to 17 inches on average."