No no no. We must now have floating headers that don't give any indication they belong to the columns below them, much less that you can click them to sort the

No no no. We must now have floating headers that don't give any indication they belong to the columns below them, much less that you can click them to sort the columns. 95% of possible actions must only appear when hovered over. Buttons should not look like buttons, nor should they provide any feedback that they've actually been clicked. Etc.