The modern workforce shouldn't be flinging copies to each other. A copy is outdated the moment it is downloaded. A copy has no protection against illicit reading. A copy can never be revoked.
Data shouldn't live in a file on a laptop. It shouldn't be a single file on a network share. Data is a living beast. Data needs to live in a database - not an Excel file. Access should be granted for each according to their needs.
— Terence Eden, We've got to stop sending files to each other