Hey guys, interesting discussion you have going on here.
With the new docs still being partially incomplete, I can understand that not all (OH2) users are going with it. I do not miss to annoy users with a link to them ^^
I'm sadly a bit behind in the ambition to make the forum a bit more guided. As the two of you already discussed, the forum can definitely need some guidance in the individual categories. I'll very soon start creating pinned posts that contain a description what the category is for (and not!), important links and an FAQ section.
I would also like to establish some kind of competence awareness among the moderators, allowing them to invite the right people to threads they personally can not help with.
The Tutorials and Examples is especially important to me, as they will considerably help new users getting started and understanding concepts and possibilities with OH(2). Judging by questions often asked regarding rules and sitemaps, this is definitely an area we should improve in.
As @rlkoshak pointed out, that's a problem because (a) openHAB is available for all platforms, (b) at least for the next 3-5 months we are still dealing with openHAB1.8 stable and openHAB2 beta setups and (c) I wouldn't say that the manually installed setup is any less functional - it's just a question of how good the system is managed. (That said, I would recommend an apt installation.)
Earlier you discussed, that it would be nice to give more guidance to unexperienced users, especially in the first forum response. In my personal experience, the more you take people by their hand and show them the way, the less they look to the left and right... It is very important to give helpful and complete answers but in the same moment empower the user to find the solution by himself. Making a few assumptions (like with @Max_G 's XYZ example), giving some advice and posting relevant links is probably a good practice.
Regarding linux, I wanted to point out to the links I included here and here (right beneath TOC). If something like this found its way in the FAQs, we should starting to reference that section instead.
In general, you should start of with a short description, pros and cons of your solution, requirements and a screenshot. Then describe the setup process. Remember links for when things go south. The last thing I wanted to write in the sticky is that it would be great if the creator of the first post would incorporate things discussed in the comments (improvements, alternatives, potential problems)...
Related to the presence topic, I think it would be good to also reference the already discussed alternatives and give comparison as far as you can. That would be the first question I myself would have regarding that topic which seems to be solvable in 10 different ways.