Hi, I have a thread in Gambling sub-forum and I'd like to delete old posts that don't make any sense now given how our website has changed.
That's fitting for most threads that run over a long course of time (for example, I doubt the first repiles in the Primedice thread have any relevance today).
Usually, that shouldn't disturb, but that's your decision.
Apparently this is called "self moderation"? However I don't see any option to delete posts other than my own or any way to change the options for the thread itself.
You can only start a self-moderated thread from the beginning, there's no option to make it self-moderated later.
Do I ask mods to delete the thread then create a new one? (Making multiple threads is a Bad Thing)
Lock your thread, move it to Archival. Start a new one that is self-moderated.