True, my point of view might not take everything into account, but for trains, the ability to add capacity is limited, mostly constrained by tracks leased time.

True, my point of view might not take everything into account, but for trains, the ability to add capacity is limited, mostly constrained by tracks leased time. For the train I take to go back home, the price varies between 35€ and 220€. This is excessive! And not much better than sold-out seats..