With void-returning methods and null-punning you can end up skipping critical side effects, which are more common in idiomatic Java than in idiomatic Clojure. C# tries to make this explicit for the receiver with its Elvis operator and nullable reference types.

    foo?.Bar(baz);

and

   var result = foo?.Bar(baz);

both do what's expected: skip the method call and return null (or void) if the receiver is null, and the compiler complains if you don't do that when foo is inferred to be nullable.