The thing with tech though is that it's easy to add new connections, connecting anything to anything. You might have two independent datasets that can't be sto

The thing with tech though is that it's easy to add new connections, connecting anything to anything. You might have two independent datasets that can't be stored together due to privacy or security regulations. The teams who work on that know and understand that. But some other team working on something completely unrelated might join those datasets for some non-nefarious purpose, which then creates a new dataset with those data combined. Now other teams who also don't know about the regulations might build on top of that combined dataset. They might even generate new data fields from the data that's not supposed to be joined. This stuff can propogate through layers of systems, queries, service calls, analytical engines, offline spreadsheets, etc. It's very difficult to keep track while keeping your engineering teams independent and nimble.