diff --git a/doc/todo/registerurl__58___do_changes_in_journal___34__in_place__34____63__/comment_23_4b576c9c33ff2a322cd832027484606b._comment b/doc/todo/registerurl__58___do_changes_in_journal___34__in_place__34____63__/comment_23_4b576c9c33ff2a322cd832027484606b._comment
index f7d08b4a9d..e7ef924e9a 100644
--- a/doc/todo/registerurl__58___do_changes_in_journal___34__in_place__34____63__/comment_23_4b576c9c33ff2a322cd832027484606b._comment
+++ b/doc/todo/registerurl__58___do_changes_in_journal___34__in_place__34____63__/comment_23_4b576c9c33ff2a322cd832027484606b._comment
@@ -6,6 +6,10 @@
 @yarikoptic let's discuss such a hypothetical command in another todo if
 you turn out to need it.
 
-If you have a way to avoid feeding redundant data into git-annex
-registerurl, you won't need it.
+If you have a way to avoid feeding too much redundant data into git-annex
+registerurl, you won't need it. I guess that the 8k redundant urls would
+not be enough to be a problem, since it would only slow down reading a bit.
+
+If you had a cron job that was adding the same url 8k times every run, so
+accumulating an growing number over time, then such a command would be useful.
 """]]