A cottage is the perfect place for Cairn!

Yes. We have a license to replace the OGL. It works. There is still no viable argument to use ORC over OGL other than to remain in complained with specific existing 3rd party licenses.

This is a good answer. As the blogpost says, I would separate the NSR design community and the NSR philosophy into two related but distinct categories; essentially what @Enfors@lemm.ee suggested is correct. Cairn for example is very much an "OSR game" in that it focuses on lethality, problem solving, critical thinking, emergent narrative, and so on. But it eschews B/X compatibility (not even close!).