@TedwardBear why is this feature requested cancelled? Is there a reason not to support adding a row to the end of table when the Tab key is pressed within the last cell of the table? This is a common and intuitive convention for building tables.
While ⌘Return is convenient to add new rows in the middle of a table, the 80% use case for creating a new table is not intuitive:
As opposed the prevailing convention of supporting the addition of a new row to a table if the Tab key is pressed in the last cell:
(where the table grows as needed)
Since pressing the Tab key within the last cell of a table currently does nothing, could you make it an alias for pressing ⌘Return and navigating to the first cell in the (new) last row? This would allow ⌘Return to continue to work as it does and support the common convention of growing tables as needed with the Tab key.