It is clearly updated regularly, the last update happened like 20-odd days ago.
If curator isn't dead, why isn't the version numbering the same as all of the other ELK products?
This makes zero sense and is very confusing when every other compatibility matrix looks like this:
The latest version of Curator should be version 6.5 and even if there are no changes, it should be updated with the version numbers of everything else.
If it just so happens to be compatible with more than the other products, that's fine. It's confusing that everything else follows a rigid compatibility matrix, but curator does not.