Earlier quoted context omitted.
But then it isn’t “internal”…
It’s too hard to determine what pieces of your stack interact with public-facing services, particularly in a monorepo with thousands of developers. The effort involved and the legal risk if you get it wrong makes it an easy nope. Just ban AGPL.
The effort involved, and legal risk is exactly the same as for any Copyleft license. If you don't know what your stack is doing, that is the problem -- not the license.