A computer system must be built to fit the needs of the users or the organisation it's used in. There are fundamental differences between systems used for educational purposes and systems used for administration or business. Business systems are characterized by the sensitive information it carries. The amount of programmes run are often very few but they have to work. Therefore it has to be secured against intrusion or crashes.
Demands here are high.
There is usually an incentive for people to force the system. If data is intercepted by outsiders there is a chance that no backup will help. Educational systems are examples of the opposite. Schools have to look forward, encourage creativity and the hunger to try different solutions to a problem. This takes a lot of different programmes and hardware settings and sometimes crazy solutions.