Add 'and uses much less memory' where salient.
@@ -370,7 +370,7 @@ problems if the join requires more memory than is available.
!!! note
[`kgtk ifexists`](https:../ifexists) provides an experimental join mode that works with
- presorted input files. In the future, `kgtk join` may be offer support for
+ presorted input files and uses much less memory. In the future, `kgtk join` may offer support for
presorted input files.
