It's great for laying out things meant to print, and making invoices and stuff... But why didn't we have code files and proper fixed layout DB-style tables as "pages" that can go in a workbook?
Maybe keeping everything as 2D as possible is a necessary compromise for the spatial thinkers out there, and they just wouldn't want it if it was full of boring linear stuff.
I love the reactivity and the concept that anywhere you put a value, you can put an =expression. But the 2D stuff seems like it's for the people who always have a sense of where things are in space.
They've done a good job of convincing people that it's not programming and they can do it, I can't really complain, because if Excel didn't exist we might all still have to use paper on a regular basis, or completely unstructured text files.