I think you'll find that 'large corporations' are awash in Excel monstrosities.

I've worked at a few unnamed places, medium to huge, that used Excel and Access in horrifying ways. One place, with 60000 employees, had an 'editing cone' which was an actual traffic cone that you had to have in your cube if you were writing to the Access file on the SMB drive. During my time there, one person ran their Excel script sans cone and a bunch of people didn't have to pay their bill that month.