I thought the rule was that if there is an existing thread for a topic we should use it, rather than spaghettifying the forum by creating new threads all the time for old topics.
Necro'd posts are usually a result of someone not taking the time to ensure the thread they are posting to is current and relevant. We see this frequently on these forums. Not all old threads are necro... some are living breathing threads continuosly being updated with new info. They were never dead. In the case of a 2016 thread that layed dormant for a very long time.... it was dead. In this particular example the info contained wasn't necessarily obsolete... so no biggee.
a) Often the person that necro'd a thread didn't notice it is a necro... they just found the thread in a search and are responding to ancient discussion. This is a waste of time for everybody.
b) People reading threads on forums often fail to notice the date on a thread being necro'd.
- So they waste time reading a bunch of ancient crap before realizing it is ancient.
- Or they respond to the OP instead of the most current post. The message in the recent post gets missed by some, instead replies emerge in context to the ancient OP.
c) Often the title of a necro can really confuse people. The recent necro on the News & Announcement subforum is a good example.
d) Often the content found within ancient necro posts is obsolete, incorrect, or misleading.
e) Many people don't like having to read through ancient necro posts to understand the context of the resurrecting post. Yes people could ignore the entire thread, which many do. But not all old threads are necro... sometimes they just have a long lifespan with continuous fresh posts and updates. These aren't neco, just long lived.