It's not really the intended use case of Lua to be used in things that will be upgraded after they're released. It's meant for things that need to work exactly the same way in a decade as they do now, and that's best served by sticking to a specific version and either only upgrading to bugfix releases, or sticking to one specific commit forever. Those use cases also are better served by sticking to old versions of any libraries they use that are written in Lua (otherwise they might be hit by regressions or turn out to have been reliant on old buggy behaviour that's been fixed), so probably aren't upgrading to newer versions. That's why the article is making the point that it's not worthwhile for the maintainers of those libraries to keep compatibility with old versions of Lua as the people still using old versions of Lua are probably going to be sticking to old versions of those libraries, too.

I've not seen it so much with Java, but for Lua, it's not an English word, and most things in software are either English words or acronyms/initialisms, so it's usually a safe heuristic to assume anything that isn't an English word should be capitalised.

I wonder why people do this. Happens a lot with Java too.

Look at my other reply that explains and links to it: https://lemmy.ml/post/50986115/27084875 or this link https://lemmy.ml/comment/27084875 I'm not sure which type of link to provide, same comment.