I'm wondering how Microsoft is responding to this. Do they expect their current Excel dominance to continue despite competitors constantly catching up to feature parity and even extra goodies, like this one?
You don't shop for Excel, you shop for Office. The contracts around O365 are pretty onerous to get out of if you're an EA customer, and the process of going away is full of pitfalls and surprises.
Google used to say that everyone who did an RFP chose Google Apps/GSuite. The problem is that nobody does that!