alt Hacker NewsMore specifically, the Scientific Python community through SPEC 0[0] recommends that support for Python versions is dropped three years after their release. Python 3.12 was released in October 2023[1], so that community is going to drop support for it in October 2026.
Considering that PyPy is only just now starting to seriously work on supporting 3.12, there's a pretty high chance that it won't even be ready for use before becoming obsolete. At that point it doesn't even matter whether you want to call it "in active development", it is simply too far behind to be relevant.
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This is silly, there's no killer feature for scientific computing being added to python that would make an existing pypy codebase drop that dependency, getting a code validated takes a long time and dropping something like pypy will require re-valditating the entire thing.
They appear to be talking about CPython implementations, taking into account when those versions continue to be sorted (in the sense of security updates). That's irrelevant for PyPy, which clearly supports version numbers on a different schedule.
What's the point of a three year window? It seems like a weird middle-point. Either you are in a position to choose/install your own interpreter and libraries or you are not.
If you can choose your own versions and care at all about new releases, you can track latest and greatest with at the very most a few months of lag. Six months of "support" is luxurious in this scenario.
If you can't choose your own versions, you are most likely stuck on some sort of LTS Linux and will need to make do with what they provide. In that case three years is a cruel joke, because almost everything will be more than three years old when it is first deployed in your environment.