Support is one reason. If your database goes down, they'll send a team of engineers to figure out what's wrong. If they have to, they'll bring in hardware to du

Support is one reason. If your database goes down, they'll send a team of engineers to figure out what's wrong. If they have to, they'll bring in hardware to duplicate your systems, and have engineers working on it 7x24 until they find out what's wrong. Not many vendors can provide that level of service, and if your business requires it, you're willing to pay for it.