Complaining that all existing tools are old, but I'm looking at the documentation and the what immediately catches my eye is that it doesn't use any modern convention I've gotten used to?

Overwrite with "-w". I've never seen a tool not use "-f"

Not reserving "-h" for help text is also an interesting choice. Makes me think of the mantra "be conservative in what you send out but liberal in what you accept". Per that philosophy, both "--help" and "-h" should be accepted because neither gained a decisive majority in usage and so people might try either. It's not like you'd know what to use because it hasn't told you yet

Forcing use of a long option "--press=N" (for the zstd level setting) is also new/unique terminology for what is usually "-N" (like "-1" to "-9")

(Basic) drop-in compatibility with every other tool from gzip to zstd would also have been nice, but archiving and compression are different things and everything from zip to 7z to tar works in unique ways so this makes enough sense I guess. Still, could have been useful

It's still better than tar or ps, so if it catches on that's still a step forwards in terms of command line standards