I've now completed updating chapter 9 for the new layout, and the results are visible at https://www.postgresql.org/docs/devel/functions.html There is more to do --- for instance, various contrib modules have function/operator tables that should be synced with this design. But this seemed like a good place to pause and reflect.
Would it be premature to complain about the not-that-great look of Table 9.1 now?
Compare the two attached images: the screenshot from