Any word on the "single codebase" aspect of supporting both major Python versions? I remember suggesting it years ago at a time when the team wanted to do Merc

Any word on the "single codebase" aspect of supporting both major Python versions? I remember suggesting it years ago at a time when the team wanted to do Mercurial backporting instead. What changed their mind? That looks like it could fix the lag on CPython releases, so it's a big feature.