I did out of curiosity once. It worked out of a VM on my desktop, but I couldn’t get it working on my laptop. I think it didn’t have drivers for that Wi-Fi chip, but I can’t say for sure. It makes you appreciate how refined Linux distros have become.
Simplicity in all the good and bad ways. They also claim to be more secure but I'm not sure if that really applies anymore.
Many security-related things started as an OpenBSD project, like openssh. They don't shy away from making drastic decisions for the sake of quality. For instance, in 2014 when they noticed their bluetooth stack or bluetooth as a concept sort of sucked, they didn't rewrite it. They removed it. I don't think it has been rewritten yet.