It seems to me that the only advantage is slightly tidier URLs, but with the disadvantage that source files change dir level and relative links need to change too.
--- [[KarlMW]]
\ No newline at end of file
+-- [[KarlMW]]
+
+The cleaner urls seem worth it to me. The `urlto()` function makes it easy
+for ikiwiki code to deal with the path changes. --[[Joey]]