We're reluctant to add more and more features to HSM, as it just becomes bulky, hard to document, hard to understand, etc. RM is intended as a companion to HSM for exactly this sort of 'extension' of functionality.
Sure, I get that and I'd guess number of folks with wells is likely very small.
There are a number of other feature requests that I'd like to see ahead of this request too but this was on my mind yesterday as I was working that aspect of my home's automation.