In far future: If you'd start some wikipedia-like organization that edits a subset of public maps, with scientific quality-checking, then you could consider building up some diagram-supplement to wikipedia over the time, at least for some topics. The value of this public maps stand or fall with the quality of their content.
Possible would also be (subsets of ) public maps that represent individual home-pages with personalized content, or with marketing, or with culture, or with opinion. Any of these style-decisions would produce another background for the private- and team-maps.
ok, starting without quality-check, perhaps a description of programming-languages for beginners, because many people could contribute to that easily; but at low level from my side. I recommend to avoid difficult or controversial topics in the subset until you have a large number of fair quality-checkers and established communication-ways.
As you have shut the map again, I suggest a feature of commenting to closed maps, to enable feedback to an owner. There already was that idea of giving special rights to others, like the right to produce a new box inside of another box.
Hi Andrew, I did nit intend to shout you out of the map, but indeed you were gone from the list of editors. Thanks for reporting. We are investigating what might have gone wrong. I added you again now.
Do you mean public maps that are authored, checked and edited by the community - like wikipedia articles?
And then having these corresponding and linked to actual Wikipedia articels?
Yes, I could imagine that. Because anyway you will get a great collection of public maps after some years, so one might consider if people would like to submit them under quality-check and give them a public value. And wikipedia itself consists of long texts, so there might be a need of high-quality summarizing diagrams, which can then be integrated into new projects or education. Just an idea to consider as an option, and not in a hurry.