I'd say the success of REST kind of proves that's something that for the most part can be worked around. Often comes down to the JSON codec itself, many codecs will allow unmarshalling/marshalling fields straight into long int types.
Also JS now has BigInt types and the JSON decoder can be told to use them. So I'd argue it's kind of a moot point at this stage.
Also JS now has BigInt types and the JSON decoder can be told to use them. So I'd argue it's kind of a moot point at this stage.