>Well, I'm firing my Nvidia proprietary driver users. Really, I never "hired" them in the first place. The ones who use nouveau are cool in my book. I don't feel the need to call this out in the README.

Upon thinking about this, it's kind of like listing dependencies. I think you should make it clear in the README. I don't think the blog post is relevant in this context, as people likely won't read your blog post before installing Sway (and how would they know to do so, anyway?).