Thanks for sharing your thoughts!
The list is comprehensive and there are definitely some cool ideas here.
The reason why I would like to implement such a service is that I have a
formal GIS higher education and I always loved maps, cartography and
everything in between. So, this actually is a potential "hobby" project,
but wanted to see if there is any demand for commercial application, and if
so, find which features I should focus on and implement first.
Would you be able to list one or two most required features that would make
a map good enough to be useful for real world usage?
Also, how can the map be useful to community managers as well?