You shouldn't be downvoted, average cruise speeds now are less than in the 1980s and considerably less than in the 1960s. And modern short / medium haul airlin

You shouldn't be downvoted, average cruise speeds now are less than in the 1980s and considerably less than in the 1960s. And modern short / medium haul airliners are designed for lowet cruising speeds. Ryanair notoriously uses a very aggressive Cost Index for flight planning which favours absolute economy over speed, to the extent that sometimes ATC complains about their low cruising speed More about CI: https://www.skybrary.aero/index.php/Cost_Index https://www.skybrary.aero/index.php/Cost_Index