Some, most?, of the things you mention are available in other languages but they generally do not come together so well and they feel clunky. I think it's not

Some, most?, of the things you mention are available in other languages but they generally do not come together so well and they feel clunky. I think it's not so much whether the features exist in other languages since we all know they can be added but the whole being more than the sum of its parts.