Advantages: monopoly, competitive advantage, others' monopoly can not be implemented, so you can monopolize and occupy an advantage in the competition.
Disadvantages: high risk and high investment. If you monopolize, you have to pay more than the ordinary license. In addition, on the one hand, there is the problem of patent stability, on the other hand, there is the possibility of technological leapfrogging, that is, technology may be leapfrogged or eliminated, of course, it depends on the specific technical situation.
For sellers:
Advantages: peace of mind.
Disadvantages: If the patent itself has a wide range of applications, just like the sliding screen unlocking patent of mobile phones, many manufacturers can implement it, then it is necessary to calculate whether the exclusive license or the ordinary license will get more money.