A very central issue to classic gaming, is that CRTs didn’t have pixels as we know them, and games were generally not designed with square pixels. The numerous Google hits on the topic (e.g. Hot Hardware, PC World, PCGamesN, Reddit, AMD) shows that it is a topic of high interest amongst gamers, professionals, hardware manufacturers and more. It is therefore an issue that I believe deserves its own tag, and I hereby suggest scaling to be included.
There currently are two examples of posts where this might be useful: