One example is whenever my company switches to a new health insurance plan. They send 1 or 2 people who are very knowledgeable to introduce the plan. They meet with us in the conference room with donuts and tell us that everything will be covered. We ask about different scenarios, and they clearly explain to us how we would be covered under those scenarios. Then we never see those people again. When we go to the doctor 3 months later and get our bill in the mail, lots of charges are not covered. The friendly people from the conference room are long gone - we need to talk on the phone for hours with people who are far less competent and friendly.
Another example is buying a car. The sales person is very friendly and tells you a lot about different features of the car. Then once you decide to buy the car, you never see that guy again. You get a hard sell on buying the extended warranty, then spend the rest of your days dealing with the service department.
It would be nice if there were a way to get continued access to the smart, friendly people after you purchase something.