[hkscfreak]

> Another downside is that it's difficult to isolate Ion-aware code from the more general purpose "business logic" in an application, due to the absence of a serialization layer producing/consuming POJOs; instead it's common to read an Ion structure from the wire and access it directly from application logic.

This is indeed a common pitfall, especially since traversing Ion is slow and expensive. I've squeezed up to 30% performance gain by converting Ion data to POJOs up front and just using those.