Well, there is another little wart that comes with it: if XChat is compiled with Python support and there is no Python installed, XChat prints weird error messages on startup (about shared libraries not being found). Given that, the SB2 incompatibility, and the fact that nobody seems to need it (this is the first request for Python in months, and only because there is some obscure plugin that uses it), I simply do not want to mess with Python support.