Yes, it's goddamn immutable collections and Optionals.
People still hate it because it's immutable, therefore you can't do hashmap.add(), and it's hard because they can't randomly return nulls, and it's slow because the hashmap now takes o(log n) always instead of o(1) sometimes and o(n) other times.
People hate it because it's different to the Java they learnt 20 years ago, that they claim is exactly the same as today.
People still hate it because it's immutable, therefore you can't do hashmap.add(), and it's hard because they can't randomly return nulls, and it's slow because the hashmap now takes o(log n) always instead of o(1) sometimes and o(n) other times.
People hate it because it's different to the Java they learnt 20 years ago, that they claim is exactly the same as today.