[umanwizard]

Woah, you're right. I thought YAML was much younger. I stand corrected.

Ion is definitely from last decade, at least. So most of the speculation in my post stands.

[jonhohle]

The JSON RFC was published right around the time Ion was being created making Ion about 10 years old this year. It was not clear at the time that JSON would become so popular ;-) and at the same time Ion fixed a lot of its weak areas (numeric types, dates, struct/object syntax, etc.)