I actually suggested this a while back (and created the categories) but to no avail. I also suggested that we add a header to each page (maybe a table) that would act as a version compatability / relevance matrix, again no take up
(It should be possible to to a mass modification to put an empty matrix at the top ov every page on the wiki, with an "unknown" status for every version. That way, s soon as someone visits a page with knowledge of its relevance, they can simply modify the matrix. This would have the effect of not only making the pages consistent, but also reminding folks to do this.)
One of the most frustrating things about the wiki is that it's hard to know if information is current / relevant. Even the last edited date doesn't neccessarily help! All these ideas are good ones for solving the problem, but only if there is "buy in" from everyone. Even a "Works with 810" logo on pages would be an improvement!