If you're interested in the historical rationale for Rye I suggest reading the original README from when it was first released: https://github.com/astral-sh/rye/blob/8e430b0519fe2a125837e1...

And Armin's later post about the vision for the project a year later: https://lucumr.pocoo.org/2024/2/4/rye-a-vision/