That requires you to be running the right version of python at the system level, and for all your installed tools to have compatible package versions. It doesn't work very often for me
What sorts of things are you installing that you "often" need to care about having the "right" version of Python? It's normal in the Python ecosystem that packages explicitly support every non-EOL Python version. Numpy already has wheels out for 3.14. And even if you use an older Python, the older compatible Numpy versions don't go away.
Can you give a concrete example of an installation you attempted that failed?
What sorts of things are you installing that you "often" need to care about having the "right" version of Python? It's normal in the Python ecosystem that packages explicitly support every non-EOL Python version. Numpy already has wheels out for 3.14. And even if you use an older Python, the older compatible Numpy versions don't go away.
Can you give a concrete example of an installation you attempted that failed?