And something that isn't AI or an advertising opportunity…

Though they have been slowly adding useful new features to Excel (auto- spill is one I occasionally find to be both a time saver and a mistake reducer) for a few years now, after a long time seemingly doing very little with it. While I'm all for things having a "done" state and after that not doing much with them so as to not break a good thing, there is plenty of room for little improvements like new functions (admittedly many of them likely a bit niche) in Excel, just as long as they don't break what already works at the same time.