Maybe passengers are sitting on the floor?!

[Anzatax]

First class on an ATR (as well as business or really premium economy) isn't realistic. This game should have restrictions on which classes you can put in which plane.

It could be realistic! If a person wants to run an airline which operates short Business Class flights then he can configure the E145s or the ATRs in an all Business Class aircraft. It's just that some airlines don't provide that service for short routes in Real Life.

Actually, it's just that no airline provides such services for short routes in Real Life, which is precisely why it is unrealistic .

Of course, in a way we can include business jets (and maybe props) in that category, but that is technically not a regular scheduled airline route. And I would say that an ATR with all business for short haul would be probably unprofitable .