I think you'll find no 18.04/bionic system has ubuntu-security-status, so users of 18.04/bionic (or older releases) will need to use
ubuntu-support-status
(it's essentially the same tool; it was renamed (and output changed) a few cycles back to clear some misunderstandings..)
PS: Thanks for this Bill ... I'm writing one now, and if/when you'll see it you may notice some parts are stolen 