I'm so glad to see this post. I remember having a conversation with someone from Etsy at one point and they made an offhand comment about MongoDB having been a

I'm so glad to see this post. I remember having a conversation with someone from Etsy at one point and they made an offhand comment about MongoDB having been a terrible idea with a hint that there was a longer story to it than we had time for. I've been curious about the story ever since. Finally, some closure!