I need to check on available tunnels and carriages every few in-game days. Yes, I’d also have to count my hands every hour if they weren’t glued to my arms.
Would be nice if the the assets menu could be opened by a simple click with the right (menu) mouse button anywhere on screen in order to have a quick look at those numbers. Seems to be just the natural behaviour to me anyway.
That said, after months playing I still can’t help but trying to use the mouse’s scroll wheel on the city selection screen instead of clicking or pulling the cities.
I also think that sounding a train’s horn when holding the middle mouse button would add great value to the game.