This feels like a nerdy one but, believe me, it’s of vital importance. If a CRM system puts limits on the amount of data that can be stored then you are forcing people to make decisions about what data is kept. And the chances are that the stuff that gets thrown out is exactly the stuff that senior management need to make the right decisions about the business. And if the data they need isn’t in the system, they can only assume that the system is no good. Watch out for that one!