Scala is its own worst enemy in this respect. It’s both too close to Java and too far.
Too far: there are several dialects one can use with it e.g., I can speak Haskell with Scala grammar. Unlike with Java there is no central Scala dialect, so reading/maintaining a Scala codebase can be a challenge.
Too close: its type system, as advanced as it is, is still stuck in Java’s inheritance and all its limitations. Traits, for example, are not runtime components, they dissolve into the hosting class’ single object, giving up the independent identity and flexibility of runtime configured composition. And the Scala 3 `exports` feature that departs Java’s inheritance is just forwarding, not true delegation; it is the inverse of traits: it trades self identity for independent identity (no late-bound self that comes free with impl inheritance).
Too far: there are several dialects one can use with it e.g., I can speak Haskell with Scala grammar. Unlike with Java there is no central Scala dialect, so reading/maintaining a Scala codebase can be a challenge.
Too close: its type system, as advanced as it is, is still stuck in Java’s inheritance and all its limitations. Traits, for example, are not runtime components, they dissolve into the hosting class’ single object, giving up the independent identity and flexibility of runtime configured composition. And the Scala 3 `exports` feature that departs Java’s inheritance is just forwarding, not true delegation; it is the inverse of traits: it trades self identity for independent identity (no late-bound self that comes free with impl inheritance).