The reason I ask is that the wiki’s software-related articles usually don’t go into enough detail that there would be any statistics to speak of, so I don’t really have a mental image of what this page would end up covering.
We have live statistics about tags because the stats complete the story that a tag description page tells. The page can sing its praises about a tag, but if no one ever uses it, that’ll be apparent. Conversely, a page may insist that the tag is deprecated and unpopular, but if the infobox shows a million occurrences, the reader can think more critically about the documentation.
Come to think of it, we don’t even have live statistics about the overall OSM database on the wiki. 
We can introduce interactive live functionality for more content, but it’ll require active development effort. If you’re familiar with JavaScript and jQuery, you can experiment with it as a user script and let others know about it. If you want to include it as site content by default, you can then propose to turn the user script into a gadget and ask an administrator to review the code.