@hugovk @pganssle is using semver, is just a happenstance that v20 got released in 2020.

@gaborbernat @hugovk The version before 20.x was 16.x, though. The whole version history is actually pretty weird: https://pypi.org/project/virtualenv/#history

It jumps from 1.x to 12.x... in 2014, then it looks mostly like semver until 2020 when it jumps to 20.x and holds there.

@pganssle @hugovk The intent there was to change the first digit to further signify that this is a major rewrite of the project. The intent wasn't to make it calver.