i have found that most of my huge json data is from uniform recordsets. there's a great json-compatible encoder for such cases that stores them in a format that's CSV-esque:
That might work for a web app, but not for mobile apps, or backend to backend communication.
anything that used json before would benefit from JSONH. things that abused json before, would be better off switching to a different format that is less restrictive than json, like ION or msgpack [1]