I saw you post "lambda is awesome" and was going to reply with "only in certain circumstances." But you beat me to it.

After about a year of poking lambda to see how it actually worked (versus how it was documented) and building a cloud formation replacement (TF eventually did what I wanted, but not before I made a simple PROLOG based replacement for it). But I finally made it work after MUCH struggle.

So... +1.

I put this in our code several years ago: "WARNING: Do not look at Lambda stack with remaining eye."