There was a period of time where almost every individual forum - Pharma and Beginners and Bodybuilding and Over-35 and Supplements & Nutrition and Combat, etc. - each had a handful of stickies that covered "the basics" and linked to some of the more popular/useful topics in that section.
But it got to the point that not only did the stickies start cluttering the forum (having to scroll past five stickied threads to get to the current topics), but people simply stopped clicking on them for whatever reason. As time went on, the thread views on the majority of stickies stayed roughly the same, so we know people weren't checking them.
If a question does now come up somewhere that's "repetitive", it's easy enough to either directly link the member back to whatever recent discussion, or tell them to use the Search box, or just be a pal and answer it again.
But I don't really see a ton of reposted threads, other than "form checks" - which do require their own threads for posting video and giving critiques - or for "how's my program/diet?" - which do require their own threads to get detailed answers.