Satellite Space Sharing

In the last decade house sharing, car sharing and other means of sharing have increased with positive return for the society. How about space sharing within a satellite?

For example, governments may come up with satellite designs that have some build in infrastructures which would be shared among the extended modules. The institutions such as universities would build modules that would be a part of this satellite. Therefore, they wouldn't need to deal with complicated task to orbit and maintain a satellite. As a result, more institutions can reach space and more research can be conducted at a much lower cost. Renting a room versus renting the whole house. Don't forget maintaining a satellite on orbit is not an easy task. Which would be delegated to the main satellite operator.