How is that not opening?

You are creating a new spreadsheet that you can save as an xlsx. What you are looking at is not the CSV file itself.

	▲	NoboruWataya 4 days ago \| parent \| next [-]
		This is a distinction that does not matter to most non-technical people.
	▲	john_the_writer 4 days ago \| parent \| prev \| next [-]
		Well I mean unless you're inspecting it with a hex editor, you're not looking at the csv file itself. Even then, I suppose you could say that's not even the file itself. An electron microscope perhaps? But then you've got the whole Heisenberg issue, so there's that.
	▲	eviks 4 days ago \| parent \| prev \| next [-]
		That's not true either, try it yourself with a simple csv file, open it, add a row and save - you'll see the original update (there are some limitations)
	▲	tokai 4 days ago \| parent \| prev [-]
		You are missing the point so hard its hilarious.