If Rust had gone for a traditional OOP system, the "everything must be OOP/use inheritance everywhere" crew would have messed up the ecosystem pretty quickly. The traits concept is refreshing and traits + structs encourage composition over inheritance. I think it has been a huge plus for the language and the ecosystem.
I really like the trait system, but “refreshing” might not be the correct word given that it is pretty much what Haskell had for I don’t even know how many years.
