Changes in commercial aviation are a constant in the quest to offer a better customer experience, or to improve profitability. Design may change on for safety reasons, or for comfort reasons, among others. But those decisions often change the future of travel, and most commonly for economy class passengers.

It’s astounding to think how a small button that adjusts the orientation of the seats causes such a headache for both passengers and flight crew. So much so that it’s come to the point of possible elimination. In the past this button was present and available for use on all aircraft. However, seat reclining has become a source of controversy. Today there are many flights that, to save themselves the hassle, disable the button.

This small button and its function have presented airlines with a number of problems, so removing the buttons has become a consideration. What are the reasons? The natural wear and tear of many parts of the aircraft and the maintenance for the repair of reclining seats.

It may not be apparent to the traveler, but every detail counts for the airline, and the simple recline function adds extra weight to the aircraft. Some modern seats can weigh between 7 and 10 kilograms. Reducing the weight on each flight means fuel savings, which counts towards the profitability of the airlines.

When someone feels that their seat is being invaded and arguments erupt between passengers, the attendants have to act as mediators. Flights have even been diverted to deal with these altercations. In the United States there were reports of the use of a device called a “knee defender, which prevented reclining the seat in front of them. According the Associated Press, use of such a device triggered multiple in air disputes.

A modification eliminating the buttons on the armrest and installation of pre-reclined seats were enough to make seats lighter. Also, setting the backrest at an intermediate angle meant passengers were not so upright, but not so reclined either.

Such measures were first implemented by low-cost airlines, which are characterized by offering short flights that eliminate unnecessary functions inside the aircraft.

The changing of seats has also included a thinner backrest to give the impression that there is more leg room.

Not only have low-cost airlines implemented changes in the shape of the seats, but full-service airlines have also opted for these special seats in their fleets. This has allowed the selling of first class seats with more legroom and a better recline. At an additional cost, of course.

The debate on whether the change in the shape of the seats is positive for passengers can have differing points depending on the flight. While it might be possible to avoid arguments by making the person seated behind more comfortable, trips that require many hours might become tedious when stuck in the same position and unable to adjust the seat position.