Every major Architecture or Visualization related software has a roadmap these days, and some let people vote on what's most important. Various software use different websites for their needs, main ones being Trello and Productboard. Here are some examples:
Corona Renderer: Corona Trello Roadmap
Twinmotion: TM Productboard Roadmap
Unreal Engine: UE Productboard Roadmap
Revit: Revit Trello Roadmap
In my opinion Archicad needs to create a development roadmap that is public and easily understood. Even better if users are able to vote (much like in this forum, but in a more structured way - no need for the user to create their own poll with varying poll options). The current forum wishes section seems to be working fine, except there is no way for a user to check if the wished function is being worked on or not.
I think that the previous argument of "competition stealing ideas" is pretty invalid now that AC's arguably biggest competitor is publicly displaying their upcoming features. If this is still of concern to Graphisoft, the roadmap could simply be made private to forum users only. If this level of privacy is still not enough, I'm sure there could be a middle ground.
I think GS has perhaps been using the element of surprise as a wow factor to keep people excited about new releases, but this itself is not good enough selling point anymore seeing as a 'surprise' feature could go both ways. Happy to hear some thoughts about this.
AC26 ARM //
MBP M2 Max //
Ryzen 2700x | GTX 1660ti //
UE5.1 | Twinmotion | Corona | Rhino