There are areas where mouse wheel should work that it doesn’t. For example a few controls mouse wheel can move, other types it cannot.
QWERTY keys like arrows do not work in some of the browser areas, but do in others. Mouse clicks should be the last resort to do anything, as arrow keys and mousewheel are much faster and easier on the wrists! The lack of consistency from place to place is just confusing for those of us trying to use keys and mousewheel which only works in places.
Tabs or arrows between controls and chord previews would be amazing.