Yes musing was very much helpful to me in number of ways. Such as:-
Sharing knowledge is always good even it increases your own knowledge.
It enables to broaden my vision and I can get different point of view for a single problem/ question.
It also enable me to get some earning while sharing my knowledge.
It also allows me to ask question and clear my doubts.
Now a days he activity on musing has been very limited and it is loosing the interest of many people.