Comment by KolenCh

I think you missed the point of reproducibility. If a stack is maintained with the mindset of reproducibility, then it will do exactly what you said, that it will never change and always works and don’t need to be maintained.

If the software stack is reproducible, then you decouple that to the environment and hence upgrading the OS shouldn’t break it.

(That said it is very difficult to be 100% reproducible, eg your hardware can change from x64 to arm64… that’s why people are suggesting docker. I don’t like docker in the sense that it is a lazy approach to make things reproducible. But the guarantee there is very high.)