Removing nullability of a reference doesn’t mean removing null-relationships, it means properly typing them as Maybe/Option sum type to forcibly diverge code paths that work with non-existence cases. A language without an advanced compile-time type system cannot have these, not to mention untyped languages. You can’t just remove null/none/nil/undef from js, python, etc.
NaN self-inequality comes from the old FPU design decision (FCOM/FUCOM instruction group), which is probably questionable (or rational if you dig deeper) in regard of a programmer’s convenience. That carried over to all languages because it’s a fundamental hardware behavior that cannot be fixed without an overhead.
NaN self-inequality comes from the old FPU design decision (FCOM/FUCOM instruction group), which is probably questionable (or rational if you dig deeper) in regard of a programmer’s convenience. That carried over to all languages because it’s a fundamental hardware behavior that cannot be fixed without an overhead.