I did vote Excel as the “greatest computer program of all time” in my thread here:
I use it for a lot of things, usually mathy, but also stores of data - for example, I have this one spreadsheet that has the American box office totals from 1920-on for over 10,000 films. Probably should be in a database, but it was easier to steal the data and plop it in Excel, so c’est la vie.
I once created a simple Excel form where I had the math done on a separate tab and you would’ve thought I invented Jesus.
I’ve seen people use it as a word processor. Those people are stupid. I don’t know what else to say - I try to be kind, but if you are using a spreadsheet as a general word processor, that’s stupid. OTOH, I’ve used Excel to create lists which could’ve been created in a word processor, so that obviously was not a stupid use of it. 