At work, I am writing tools in Python 2.6.6 specifically because the latest version of RHEL comes with only that, and I cannot get aftermarket versions of tools onto our servers. Is that the fault of Python? No, but I'm sure I'm not the only person working at a stuffy organization with crappy open source policy.
So do I (in some cases even stuck on Python 2.4) [RHEL 5]. But at the same time (re: Python 2.6) I never really thought "oh I really need the latest 3.4 or my project will fail". It doesn't offer dramatic speed improvement, concurrency, some nice built-in web framework or anything.
I would take 3.4 if someone else spent the time testing and validating my code against but I just don't have the time to invest because I just don't see an upside to it at the moment.
