Sure it helps. Things move fast in this industry and a new thread of a covered topic will often contain new and helpful material.
As to the mods, they would certainly post a sticky if they found it necessary.
Glad to see your response. Nothing wrong with stickies, however there is also nothing wrong with someone asking a question that is new to them...if that is "wrong" then there would be little reason for a forum in the first place. If one desires to go to a library and research, all well and good, but I see no harm in someone seeking a consensus/discussion on their specific question.
I for one would eschew a forum that was so hide-bound that a poster would be chastised for asking a relevant question, whether or not the topic had been covered before.