I am partially joking (they put it on the cloud in a way that's super useful and made collaboration remotely easier, along with other scripting inprovements), but I think it highlights that the main "benefit" to Sheets is that it's a fully featured product created by a mega-corporation that complements other tools they have to offer.

Put another way: how many companies use Microsoft for everything except Excel? How does that compare to companies that use Google Drive for everything except for spreadsheets?

A tool like this one has the upward battle of needing to be so useful, it is worth employing alongside your currently existing office software. It feels like spreadsheet software is a particularly hard arena to compete in, given the quality of the major ones you mentioned.