It’s extremely rare to have projects be considered stable for years without any updates. Unless there are no external dependencies, uses very primitive or core language constructs, there’s always updates to be had - security updates, EOLs are common examples. What works in Python 2 might not work in Python 3

Software needs to be maintained. It is ever evolving. I am one of those that will not use a library that has not been updated in the last year, as I do not want to be stuck upgrading it to be compatible with Node 20 when Node 18 EOLs