[chasd00]

I remember the hype about javascript on the server (node) being front-end devs didn't have to know/learn a different language to write backend code. Not so much writing code once but not having to write Javascript for client-side and then switch to something else to write the server-side.

[erikerikson]

I remember it being both and then some...

[edit: both comprising shared code between client and server, as well as, reduced barrier to server-side contribution, and then some including but not limited to the value of the concurrency model, expansive (albeit noisy) library availability, ...]