> hitting end-of-life after five years means that for a lot project, code needs to transition language versions in the middle of a project.

Your Python interpreter will not spontaneously combust due to being end-of-life. It just eventually won't be able to run new versions of tools; but your existing tool versions should also work fine for a very long time. All you're missing out on is bugfixes, which third parties (such as a Linux distro) are often willing to provide.

When a language like Python doesn't innovate at this rate, eventually people will get annoyed about how primitive it ends up feeling compared to languages that have been around for less than half as long. The devs' time and resources are limited and they've clearly advertised their time preference and committed to a reliable schedule - this is an explicit attempt to accommodate users like you better, compared to the historical attitude of releasing the next minor version "when it's done". It also means that they're locked in to supporting five versions at a time while developing a sixth. There's only so much that can reasonably be expected here.

Seriously, what you're getting here is well above the curve for open-source development.