"Conclusions" hidden by default
When I first started "When Can I Use", part of my goal was to highlight how many neat features people could use if it weren't for Internet Explorer. That's why I added a calculated "Conclusion" to each table that indicates whether or not a feature is supported by all visible browsers/versions. By default it would usually wind up saying "Not ready, waiting for IE(6,7,8) to expire".
Since then, WCIU has mostly become a reference guide to web developers, and the conclusion serves little purpose. I have thus removed it by default, offering the option to enable it using the "Show conclusions" checkbox.