Question: Why use this instead of...

[JensRoland]

This looks very cool -- but why build (use) this instead of, say, eslint-escope? From what I can tell, this has some convenience properties on scopes and the naming feels a bit more intuitive, but it doesn't seem like reason enough to build your own?

....but given that you are who you are I know that there's a damned good reason, so I'm just curious: What am I missing? Something in the existing libraries was causing you enough problems that you set out to build periscopic -- what was it?

Or, more to the point: I'm building a transpiler and I've been using eslint-escope -- should I migrate to periscopic? Am I going to hit a brick wall when this thing gets complicated?