I'm unsure about the confidentiality of those systems, so I'm erring on the side of not expanding. However by deriving from first principles, yes, there is no

I'm unsure about the confidentiality of those systems, so I'm erring on the side of not expanding. However by deriving from first principles, yes, there is no reason to re-query the transitive closure of unchanged targets' reverse deps, so caching can happen here.