The devs decided to make 0.7 the last 0.x version due to the introduction of OpenGFX/SFX, as the inclusion of these led to the achievement of the mission goals. To make OpenTTD an open, free program independent from old, copyrighted files.
In essence, I'm asking - what should our new goal be?
To convert OpenTTD entirely into C++Looking at neob's suggestions, and in line with a suggestions I made a while ago, how about to aim to make the learning curve shallower? Things like improving the GUI and, most importantly, some form of in-built tutorial to allow people to get used to the game without being plunged into the deep end. I am not just talking about a video - I mean a proper tutorial like in modern commercial games which you interact with.
Introducing scripting to allow goals and scripted tutorials/scenarios