@Tigersharke As I alluded to, I think that you could be creating a rod for your back here with prefixes. However, a couple of things you said got me thinking. Rather than the focus being about new prefixes, I wonder if instead, the focus should be around currency.
I quite regularly see threads on this forum that have been necroed that really shouldn't have been.
On the Plex forum, if a thread hasn't been touched in three months since the last post, it's locked. Now, I feel this window is too short; it could be something longer, say six months or one year. This could be a way of preventing old threads on FreeNAS from being resurrected. What I like about this idea is that it lends itself to automation.
This idea would also help with currency. For example, let's say with new threads, you aren't allowed to start a thread unless you specify which version of TrueNAS you're considering. (This is also relevant for proposed hardware builds, which tend to be built around the current version of TrueNAS at the time.) In its simplest form, this could be a field with a drop-down list eg. 11, 12, etc. If this field were then selectable in a search, it would help to narrow down searches to threads on version-specific features of TrueNAS.
What I like about the combination of these ideas, is that the first, locking of threads, will treat historical threads. The second, the versioning of threads, provides a value add for new threads. Both ideas focus on currency and should help to reduce the administrative effort for admins/mods of managing threads, while providing a value-added benefit for forum members by allowing more targeted searches in recent history.