It's not that, it's the systems. 15 years ago I built a pretty sophisticated for its time data warehouse for a company that ran call centers. The amount of data that came off of the call systems was staggering, and the format arcane. Every vendor patch had the potential to wreck the ETL process. Then there was account data from clients, and other internal systems.
The people and their spreadsheets was the easy part to control.
The people and their spreadsheets was the easy part to control.