I don't think it's just the persistence that's the problem. NPM is now persistent (I think). But it's the fact that you can upgrade the functions. So, maybe if

I don't think it's just the persistence that's the problem. NPM is now persistent (I think). But it's the fact that you can upgrade the functions. So, maybe if the references were immutable, it'd make more sense. But then it's the fact that you've got a bunch of one-off functions which are a security nightmare to audit, not to mention accidentally slurping in several MB of functions due to the dependency graph.