With Excel, chances are I either have it on my computer, it is a single click download away, or I have another program already on my computer that can open it.
I certainly don't have Excel installed on my computer. It's not even free. And it's far harder for me to install it compared to free software, like Docker or Python (for which I can just type `brew install ...`).
If you own a Mac, it's already got Python installed on it.
With Excel, chances are I either have it on my computer, it is a single click download away, or I have another program already on my computer that can open it.