Python also seems to have more issues with stability, in the sense that things randomly stop working when you upgrade from version 3.x to 3.x+1. Lua might not be perfect either, but at least it seems common that a platform supports a range of Lua versions instead of forcing an immediate upgrade.
No, but we have a steady stream of tickets at work for scripts that must be fixed to work with a new minor python version.
I thought this was common knowledge. Just look at the non-empty list of removed things in every minor release changelog. If you have enough code to maintain something is going to affect you directly or indirectly.
