On "Hello Python 3.15, goodbye 3.10, and now I can use 3.11"

This matters less for SEO practitioners than the headline suggests. Unless you're maintaining Python libraries that need to support every active version, the Python release cycle is infrastructure noise—interesting to tooling engineers and package maintainers, not your problem as long as your stack keeps running. If you are maintaining open source that powers search tooling or data pipelines, dropping old versions is table stakes and Hugo's guide is your reference. For everyone else, upgrade when your dependencies force you to, not when a new release ships.