I think it is important to maintain a Version of the Framework that receives future bug fixes and supports older Versions of IE (at least for IE 9/10). For future development however legacy browser support is limiting our possibilities and productivity. Therefore I think we should stop supporting legacy Versions of IE.

I think this approach makes Adapt extremely attractive. One base Version that works with older browsers (for whatever reason) and a new and shiny version with all the awesome possibilities available in modern web browsers.