How do we split threads, does an admin have to do that? This is a really interesting topic, it reminds me of the standard currency thread!
I agree that modularity is key for a generic OSR system. We’ve all seen systems split up into modules, but not to the extent that the main system itself can be directly transferred to another setting (because of the base assumptions of what classes or abilities are characters comprised of). The main mechanics themselves could be self-contained modules, from abilities to classes to XP, with the assumption that you can add or remove at will without much work. Like you said, it would be good to have the tone that this is something you should make your own, or even specific guidelines on how to do that.