I mean, you're right, no one at Goldman Sachs is using Google sheets unless it's to get everyone's lunch orders together. (Hell, I bet Google's finance team uses Excel.) But most of us don't work at Goldman and don't do anything remotely complex. I would guess that 90% of Excel users fall into this category and that's who Sheets is for.
I don't know any huge, non-tech companies (insurance, commercial banks, investment banks, heavy industry, auto manufs, etc.) that use the Google ecosystem (office & mail). I'm sure all of them use Microsoft Exchange (slowly moving to MSFT cloud), instead of GMail. If someone knows any good exceptions, please share!
I think the big transition at PWC was 5 years or so ago I think, but to this day every document I get from them is Excel / Word. Despite how much work went into those accounts - these are not complex spreadsheets either!
