As part of #10578 , many folks have asked for an automated means to switch over the pool providers to the '-Svc' versions of them when they branch. This would greatly simplify the release process since there are many repos to switch over.

I don't know how this would work since not everyone uses the word "main" for their R&D branch, not everyone uses Arcade build templates, etc. It would be straightforward to add a variables yaml file in arcade's eng/common folder in main and to use it directly in our main arcade-ified repos.

@Chrisboh asked me to file this for discussion this week at triage.