Spring Question: was executing scripts in env var evaluations ever proposed?

I would ask this on StackOverflow, but I'm pretty sure they would reject it for some silly reason.

This may seem odd, but I'd like to ask about a feature that is NOT implemented in Spring, and I hope it's never considered.

When Spring loads properties files, it looks for environment variable references with "${...}". It does NOT execute scripts within that, even though that is what some shells will do. Has this feature ever been considered for Spring, and if so, how strongly was that proposal put down?

I ask this because I think someone in my org has implemented a security feature "just in case" this feature is ever implemented in Spring, and I want to have some backup to go with my argument to NOT do that.