Board Thread:Versus Debates/@comment-30323490-20180308192106/@comment-734582-20180309074850

UltimaDude wrote: What evidence is there to say that DMS Kakashi has a time limit? From what I gathered, Obito simply left Kakashi's body because the threat has been dealt with. He could've given Kakashi perpetual power. Kakashi also was shown having a serious drawback to the point he could barely move.

So, a limit exists. We don't know the exact limit (in a sense, Kakashi would simply become an Edo Tensei at some point), but a limit exists.