“Unlike other versioning schemes like Semantic Versioning and Calendar Versioning, ZeroVer (AKA 0ver) is simple: Your software’s major version should never exceed the first and most important number in computing: zero.”
The joke lands because the list is real. HashiCorp’s Vault and Terraform both made it, and so did TOML. A 0.x number means the maintainers never have to promise anything stays stable. Enterprises bet production on it anyway.