The cloud is a terrible bet for many large companies. The benefits are minimal while the risks are huge, however what’s in the best interest for the company is only tangentially related to what happens.
It’s really difficult to ensure companies actually take low probability risks seriously. A 1% chance to lose 10 billion dollars is an easy bet for upper management to make when their personal risks and rewards don’t line up with the company’s risks and rewards.
As to the risks, many companies live and die by their internal secrets. These range from a private keys, customer lists, trading strategies, and similar trade secrets to actual serious R&D efforts.
Sometimes the damage is obvious such as crypto exchanges suddenly finding themselves broke, but corporate espionage can also be kept quite. Losing major government bids because a competitor read some internal memo’s is a serious risk and you may never know.
It’s much harder to reconstruct actionable intelligence from a huge stream of people using Google search even if they’re using it to preform sensitive calculations.
There’s plenty of high profile fuckups from people falling to AWS specific gotcha’s.
From what I personally have seen, this sort of guidance remains. When companies do use things like Google Docs or Microsoft Office365, they likely have some specific contract in place with Google / Microsoft / etc., that the company's legal team has decided they are happy with.
I anticipate that the same will eventually be true of ChatGPT and such, that there will be some paid corporate offering with contract terms that make the company lawyers happy.
Most of my career has been with larger companies, often with high data sensitivity; I can easily imagine that some smaller and/or less data-sensitive companies might not care about any of this.