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> the MS ecosystem makes making all documents cloud documents and sharable and collaborative within your enterprise a total snap.

Same for Google Sheets, they're fairly interoperable with the MS formats too.

I know for a fact that trying to do some of the integrations Excel can is painful by comparison.

Also, Google Docs doesn't come close to Word. There are a lot of little features missing and each is essential to someone.

Excel has some nice integrations with PowerBI, SQL, Azure and a rich SDK.