Really? They might use some GNU programs, but I’m sure the default user land for OpenBSD is all theirs. Just because you know cp
etc. as GNU utils doesn’t mean the BSDs use the same ones. They are just part of the operating system. https://github.com/dcantrell/bsdutils tried to collect various BSD implementations for example
YOUR REALITY IS SHAKEN
YOU HEAR THE WORD “MONDAY” ECHOING AND SHIFTING IN COLOURS