What about a business with 5M customers? Storing one file per customer seems reasonable.
If you have 5 million users, you should be using a real system
https://issuetracker.google.com/issues/268606830?pli=1
> What it should say is that no matter how much you pay you have to adhere to the 5m file limit.
This is about a single user. No user should be storing separate files for 5M customers in their individual Google Drive!
That's what databases and storage solutions like S3 are for. Use the right tool for the job.