[KaiserPro]

I would suggest that is a fault of process not programming.

If there is a need to upgrade then obviously you need to do it. However if your pipeline doesn't touch unicode, and your upgrading to python 3.3 purely for unicode, then its a massive waist of man power.

programs are a tool, nothing more. If the tool works there is no need to change it. infact its can be very expensive, especially if noone knows how to use it.

For example, most people don't need a pneumatic drill for their DIY. Yes it might be much more flexible, and really really fast. But the cost of maintaining it, and training to get the best use out of it is prohibitive.

However if you own a garage, hand tools are far too slow, and there are is a rich pool of talent to use you fast powerful tools.