> “*nix” means a Unix-like OS just generally
"Unix-like OS" isn't a thing that has existed for two decades. Only Linux and Darwin survived, so don't do the "*nix" thing, please.
Illumos is still actively developed, open source, and can trace its lineage back to actual unix.
For that matter, we've had new members joining the family over the years; https://www.redox-os.org/ is, in their own words, "a complete Unix-like microkernel-based operating system written in Rust, with a focus on security, reliability and safety."
Darwin is not UNIX (nor is XNU). But macOS technically is certified UNIX.
Before clicking the links.. How confident do you feel about your assertion?
https://trends.google.com/trends/explore?date=today%205-y&q=...
https://trends.google.com/trends/explore?date=all&q=Unix%20l...
BSD would like a word.