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!
