If people are bumping a thread that’s years old there’s a lot of information that may have changed since the start of that thread. Even if that’s what happens normally in a discussion, it would usually flow itself into it, not change SUDDENLY in 3+ years. Discourse has this “streaming” discussion model with threads and a huge gap may just mean it’s time for a new discussion.
For mega-threads / resource threads, we can’t really utilize the new features Discourse brings to us ( like wiki styled OP updating for example ), so they are also doomed to be outdated. It may be better to just remake them with updates, but then it may get confusing to see two open threads. Add that people are probably going to accidentally post in it without knowing, and they’ll be clashing at the recents list.
I think the only type of thread I see working are support / help threads, since adding information makes it a stronger thread when people come across it. Even then, sites that do these types of things would prefer having a new discussion made referencing the old discussion, since it keeps the suggestion pool healthy and allows for concise PROBLEM -> SOLUTION
I guess maybe this is just a scope issue for me. I think it’d be better to have more discussions going instead of potentially running back into the old holes.