When providing URLs for the documentation, for example, in posters or with QR codes, the URLs are very long and difficult to type, or they generate QR codes with many dots (for high-resolution cameras). It will be interesting to have a URL shortening mechanism based on the osm.org domain; however, I don’t know where to post this idea.
Another thing could be to have a wiki mechanism that automatically provides a short URL for the articles.
This idea came from this poster with 3 tinyurls that point to the wiki.
As mentioned above, there are plenty of shortcuts that can cut down URL lengths. If there’s still interest in creating truly short URLs for the wiki, the URLShortener MediaWiki extention can provide this functionality, generating links such as https://w.wiki/4e. This sacrifices readability of the page name to create an even shorter URL.