This idea is actually for the community rather than the Smartsheet program; right now when you answer a question and the original poster replies to you, you only get an alert if they @ your name. Consequently, a lot of follow-up questions go unanswered.
If we could add some kind of alert for "A new post was made in a conversation you participated in" (something like Reddit does when someone replies to you), it would likely allow a lot more dynamic interaction in answers to questions.