Good point, productivity. In the case of game develop, as I learn so far, without good productivity, is simply not possible, that's why I used this word. It's different from editing text with Libre Office, is possible as long I spent hours in communities discussing workarounds (I had to use a xml editor to manually edit the file). The bugs I saw are already listed, and I had contact with people involved, so I hope the next versions will come fixed - it's my office now. We must think about tools that if not perfect (is there such thing?), is stable, nice to work and have a good community to deal with bugs, though.