I think IIS is a bad example, many of it's config settings are a complete mess of partially obsoleted legacy settings. And some of it has no definitive referenc

I think IIS is a bad example, many of it's config settings are a complete mess of partially obsoleted legacy settings. And some of it has no definitive reference, e.g. the threading and concurrency settings which seem to change with each IIS version, but no documentation is available that defines what settings are available in each version.