@ash78 I have a coworker whom we need to respond to complex questions.
My tendency is to write multiple questions per email to keep things threaded - even if I do tend to write kind of "as I work the problem out" and try to include everything relevant. This is not rapid conversation or lightweight stuff... so what does he do?
He responds to the last question, and then maybe the one two from the end, and then maybe writes inline responses to some of the other questions, with only some of the people on the email, or responding to another related email chain with some other people.
Thereby forking the conversation. Yeah, he forks it up real good.
Edit: his brother, a man of few words, used to answer only 1/2 questions, last first.