That was my first reaction, but I think it can work in some cases. Take for example plugins in a paint program, or dissectors in wireshark. Both of those can ha

That was my first reaction, but I think it can work in some cases. Take for example plugins in a paint program, or dissectors in wireshark. Both of those can have any number of user-created extensions for different packet types or editing that the general populace doesn't need. However, to your point, when wireshark changes their API every few versions, all the plugins have to change as well or you either break your dissectors or are stuck on an old version. The base program should be designed with extension maintainability in mind.