Are the questions on configuration and infrastructure testing on topic on SQA?
Such questions are rather rare even on StackOverflow, but literally non-existent here, hence the question.
Good question, a lot of of it is indeed borderline and can be answered elsewhere.
The experimental devops stackexchange will complicate things even more since it is even closer.
Unfortunately I think this should be handled on a case by case basis, I can't think of a generic way to filter such questions