[amyjess]

> A big problem with Avro, BSON, and many other "binary JSON" formats is that they're not isomorphic with JSON, they have a bunch of additional stuff added on. There's Avro documents that don't have direct JSON equivalents. Which means that when a human needs to read the data, you have to transform it into some third format.

Also, field order matters in Avro but not in JSON. That bit me pretty hard once... fortunately, I found out that Python's JSON library lets you read a JSON file into an OrderedDict instead of a plain dict, so I was able to get around it.