This is my experience as well. There are very few code bases with 100% coverage and strict development practices. Moreover, if the average developers get their hands on one of them, they'll degrade soon.
The problem comes from the very "top", since CPython developers are in camp (2) and celebrate their development practices.
Other languages also have this divide of course but not to the extent that Python has.
As for maintenance: This is also true. I have rewritten a Python code base in C++. Even in C++ it is easier to maintain, because the C++ compiler does not break between versions and there are no new bugs. And modern C++ can look quite like Python.
The problem comes from the very "top", since CPython developers are in camp (2) and celebrate their development practices.
Other languages also have this divide of course but not to the extent that Python has.
As for maintenance: This is also true. I have rewritten a Python code base in C++. Even in C++ it is easier to maintain, because the C++ compiler does not break between versions and there are no new bugs. And modern C++ can look quite like Python.