I strongly believe that it is worthwhile to invest in fixing abitype.py.  It is much easier to review a patch to one python script than to review 50+ patches to C files.  There is no excuse for this tool not to work on all stdlib modules.  If there are any specific issues with the way individual modules are written that prevent automatic conversion, I would prefer to make a coding style change first and then include all modules in one automated PEP 384 conversion.