Breaks up a run-on sentence.
Moved "What does it do?" to the top
Better explanation of why I keep mentioning CouchDB.
Typos and readability.
Points of extensibility. And do NOT invent your own serializer.
Gentler introduction to why I mention testing.
Rebalancing help performance _over time_
More talk about durability.
Wrong practice.
Replace "polyglot" with plain English.