[honeycrispy]

The trait/type system can get pretty complex. Advanced Rust doesn't inherit like typical OOP, you build on generics with trait constraints, and that is a much more complex and unusual thing to model in the mind. Granted you get used to it.

[burnt-resistor]

OOP inheritance is an anti-pattern and hype train of the 90's/00's, especially multiple inheritance. Especially the codebases where they create extremely verbose factories and abstract classes for every damn thing ... Java, C++, and the Hack (PHP-kind) shop are frequently guilty of this.

Duck typing and selective traits/protocols are the way to go™. Go, Rust, Erlang+Elixir... they're sane.

What I don't like about Rust is the inability to override blanket trait implementations, and the inability to provide multiple, very narrow, semi-blanket implementations.

Finally: People who can't/don't want to learn multiple programming language platform paradigms probably should turn in their professional software engineer cards. ;)