Although I haven't chimed in until now, I have been reading the new posts. It really is a tricky thing since I feel like both sides have good arguments. I feel like a bit of a flip-flopper that can't make up his damn mind, but right now I am kind of agreeing with Nexus and his suggestion.
I still think the SFML Game Jam would be the opportunity to show to the world how much one can achieve with SFML within a very short time. It demonstrates that even without OpenGL knowledge, it's possible to develop nice games. This is the whole point behind the SFML Graphics module: Abstracting low-level operations and OpenGL while still remaining very flexible.
Since OpenGL was allowed last time, why don't we make a test run without OpenGL this time? Then we have two scenarios to compare and to take our lessons from.
The reason I am coming around to this is because, well, it is called the SFML Game Jam after all! We really should be using as much SFML as we can.
Like I have said in the past, I don't really like the idea not allowing OpenGL only because I think it would be silly to not let someone make a 3D game if they wanted to. That said, if we change it to only being able to use SFML(At the core. Frameworks/libraries built on top of sfml are still ok), then everyone is on the same level and has to use the same set of tools to make their game.
Can't we rely on people's common sense and ditch all those technology rules?
Maybe we should!
Kind of an interesting idea, really. An honor-system jam?