ok, microsoft wont support it.. but my customers will support it forever. As a webdeveloper i have still customers that are using internet explorer 8 because it is their company policy (big company)
The whole point of microsofts' action here is to say that it doesn't work like that. If you have an infrastructure of webapps/intranets/whetever then you must carry the continuous cost of making sure they sure they work on new browsers all the time, because old browsers will be quickly become insecure.