Not only is the term problematic, in many usages it’s not even really right! In the IDE example the master/slave terminology is used just for coordination of a

Not only is the term problematic, in many usages it’s not even really right! In the IDE example the master/slave terminology is used just for coordination of a communication pipeline, and has very little to do with the master determining what the slave is doing. Primary/secondary would actually be better semantically