“ZeroVer is satire, please do not use it”
Less has my favorite version numbering system. Sequential.
Latest stable release: Version 598
Perfect for things like Ubuntu, pytz, and ca-certificates.
Less for something like a library who’s API could change and break your implementation.
It's useful for Ubuntu, because each Ubuntu release is a hodgepodge of lots of unrelated updates. Some will be breaking, some will be fine.
Considering most places I've worked at just bump the minor number in perpetuity, a date-based version conveys a bit more info. Also so much easier to know when it's going out if you have a release cycle (e.g. you don't have to guess what date 3.12354.0 is going to prod, you would know it already from a version like 2021.12.25).
You can't do the same with git commit hashes because you can't sort them based on the hash alone. I have no idea how to compare deadbeef and cafebabe without checking the code itself.
Especially, like, what if you release a bugfix for a significantly old version? Do you give it an up-to-date number? Do you not give it a number at all?
(Also I see a 581.2 on that page.)
Upgrading is the problem in this scenario. Let's say 727 is the modern version. If users upgrade to 728, when 728 is based on 402, we have an issue.