IBM has made it very clear that the Query Studio tool will be deprecated in the next release after 11.2.4. Clearly that means that the Query Studio UI will be "gone". We can reasonably expect that IBM will refuse to help with any questions/symptoms reported to them at that point too.
I know that the right tactic is to try to migrate as many existing Query Studio objects as possible into 11.x Reports. That or to look for 11.x Dashboards as a replacement tool for Query Studio authors.
However, does anyone know if a Query Studio object will likely still run on that first Cognos release post-Query Studio's deprecation?