The biggest thing is that adding Python doesn't mean you get to remove anything else. If I now need python, I still need a bourne shell, I still need perl, I still need c/c++.

And frankly significant whitespace still pisses me off: as a sysadmin, I have to make a lot of very small tweaks to random code work in various languages, and most of them have the decency to let me see where the blocks are with my eyes, instead of with my cursor counting tabs and spaces. I presume people who spend a lot of time with Python use editors that show spaces, but since everything else doesn't care (other than Makefiles, but Makefile whitespace is very simple), I don't know how to turn those options on, if they even exist in my editor. And I say this as someone who writes in erlang, with it's shitty line endings, when I get to take off my sysadmin hat.