I have. We had an air-gapped network for ingesting and processing the deliverables and results of security audits and pen-tests at work. It was running windows and not Linux/BSD like the laptops of the pentesters, because most of our customers were MS shops so all deliverables we got from them were mostly documents, apps and files that were designed for Windows apps or had better compatibility on MS Office, and businesses stay solvent by conforming to their customers' needs instead of fighting them.