I digged a little deeper. MacOS lineage can be traced back to BSD and through that to UNIX. So I'm ashamed that my "ackchyually" wasn't pedantic enough.
Considering how many Mac users are software developers (either who need to work cross-platform or who really wanted Linux but were forced by company policy to choose either Mac or Windowe and picked the more unixy one), I think the number using the terminal might be a lot higher than 0.1%.