zlacker

Maybe you have deep enough experience with Node to avoid the thin ice, but my experience has been one of sparsely-featured and buggy libraries when compared to their counterparts in Python, Java, etc. All languages need time to grow up, but for now we use Node as a pinch-hitter in our stack (I created a Snowflake server with great results)

Honestly, Facebook has a lot of frontend code. I don't think Rails is a bad choice for that. My experience with large systems is that they're usually not homogenous. There's no reason they couldn't implement the Rest API components outside of Ruby if that was their biggest obstacle to success.

Though I'm not sure it is, because even though you've obviously given this issue some thought, you didn't really articulate who was put off by their use of Rails?

Edit: To avoid confusion, Snowflake as in https://github.com/twitter/snowflake, not "snowflake schema".