For that matter, if we're including the proprietary OSs, HP-UX is still kinda a thing and AIX is going strong. Of course, IIRC those are actual certified UNIX™ instead of unix-like... though I'd call that a subset, so still in scope IMO.
The linked trends suggest a revival of the term though.
> The people who do the "*nix" cargo cult thing have never seen a SunOS machine and don't even know what a HPUX is.
The meaning of words evolve over time though. Text is still broken into lines by "carriage return/line feeds" and is written on "hard disk" split up in "sectors".,. Over time people using these would not have seen a typewriter or even know what a platter is but may still use it to communicate effectively.
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."
"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.