Comment by karmakaze

Just myself trying to fit the various *BSD's in my mind, I found this[0] which might be helpful:

  [...] each one has a specific purpose.
  OpenBSD security,
  FreeBSD more desktop/server,
  NetBSD “run on anything and everything”,
  DragonFlyBSD scaling and performance.

[0] https://itsfoss.com/why-use-bsd/