NEVER revert to saved copy when reopening
When I open a file that is already open in Excel (I lose track of which ones I have open), I NEVER want to reopen that file and discard changes. So instead of showing me that irksome dialog box, Excel should simply BRING the already-open file to the front, just like Word does.
It is too much of a pain to search for that file amongst the many windows I have open with similar names, considering how I've already managed to find it in the File Explorer. Excel knows which one I'm looking for, because it knows it's already open. I should not have to find it again.