It's really not inheritance that's the issue. The issue is that in Rust it's difficult to have a data flow between objects that goes in multiple opposing direct

It's really not inheritance that's the issue. The issue is that in Rust it's difficult to have a data flow between objects that goes in multiple opposing direction, ie, a graph instead of a directed tree. Inheritance is a way of doing that, but not the only one. Rust is capable of every OOP design pattern except ones that require this kind of dataflow inversion which become cumbersome.