Comment 6 for bug 402978

Thanks for helping with installation, but the module is not Python pure and it still matters.

1. Non Python pure module can only be used with CPython thus limiting the usage.
2. C modules may not cover all architectures where CPython runs
3. 3rd party C modules may introduce new bugs (buffer overflow insecurities) etc. that were not tested by PSF members
4. 'mingw' compiler is not official compiler suite for windows recommended by PSF for windows extensions, that also means compiled code is untested for security vulnerabilities
5. C modules are almost impossible to audit for vulnerabilities for Python developers

That's why being "pure python" is important. If paramiko wasn't the package that guarantees security and its services were not network exposed, I didn't bother to complain.