There are several reasons why reclining seats are disappearing from airplanes. One reason is that reclining seats take up more space, which means that airlines can fit fewer seats on a plane. This can be a problem for airlines because they want to maximize the number of seats on their planes in order to increase revenue.
Another reason is that reclining seats can be uncomfortable for the person sitting behind them. When the seat in front of them reclines, it can reduce the legroom and make it difficult to use a laptop or watch a movie. This can lead to frustration and conflict between passengers.