[joshuamorton]

> Starlark is Python (thanks Guido!), while CEL is designed specifically to not be Turing complete or have constructs like loops, etc.

Sort of. Starlark doesn't (or at least didn't originally) support recursion or while loops or a number of other structures. There's also a few other differences that make starlark "better" for configs (some immutability is different, there's no such thing as a `class`, etc.)

I still support loops in a configuration language

    for x in sequence:
      generate_complex_thing(x)

or

    [generate_complex_thing(x) for x in seq]

are better than a lot of the more declarative approaches (such as the various contextual approaches of a number of alternative langs) which get hard to reason about because they represent implicit global state.