I see no point in doing it. Module::Build is far from ready for primetime.

If I do parallel maintenance, I don't piss anyone off. :-)

MakeMaker is prevelant, so people already have to be setup for MakeMaker, so there is no one to piss off.

Update: I noticed that Module::CoreList does this ... do any other distros do this?

Module::CoreList doesn't do it. Module::CoreList uses Module::Build which generates a traditional Makefile.PL, which is the only kind that it should be allowed to generate (the passthrough only serves to annoy)