In theory, you would create an IPNS entry for the root of wikipedia, then update that on each change. Wikipedia is a relatively static data set, so on a day pro

In theory, you would create an IPNS entry for the root of wikipedia, then update that on each change. Wikipedia is a relatively static data set, so on a day probably much less than 1% gets changed. So the new wikipedia tree reuses the vast majority of the previous version.