Are the BSDs dying? Some security researchers think so

https://www.csoonline.com/article/3250653/open-source-tools/is-the-bsd-os-dying-some-security-researchers-think-so.html

doesn't Apple contribute upstream to it or is that a myth?

the only purpose of BSD was being an off the shelf OS to embed in commercial projects, but Android and Valve set the precedent allowing Linux to be used, so now BSD will be abandoned.

OpenBSD is literally only installed on like 250 machines worldwide.