I think that younger hikers, like most young people, are more attuned to sites with less text and more video.

YouTube videos of hikers chatting about various hiking topics are very popular now. You can look, listen and learn with little effort, but a video can only show one point of view at a time, as opposed to these forums, where half a dozen very experienced hikers from many places can provide different perspectives and converse about a topic in depth. The drawback is that you must read and follow a full thread, which might develop over a week or two to get all the information presented.