Reviving old threads alerts the contributors that their input is again requested, is how I see it.
A new thread with specific questions not previously answered -- with links to old threads -- is a way of exploring the breadth and depth of the question. But if it isn't new, a thread can add to clutter.
Pointing to specific posts from old threads with links can be a very good approach. Keeps readers from having to slog they some long threads.
Take your time in setting up a thread, is my advice.
1990 35' Silver Streak Sterling
; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 10-cpm solo, 18-cpm towing
Sold: Silver Streak Model 3411