I have often questioned the notion that the OP of any thread has any ownership of it.
Clearly there will be times when a thread with eg a specific question, has run its course and is no longer relevant. What to wear to a wedding for instance.
Curiously, these threads often stay up with comments added months or even years later!
A moratorium on such threads would make sense.
On the other hand, there are threads where the OP may not like what they are hearing and asks for the whole thread to be pulled - and I would question that.
Or there are threads where OP feels they somehow “host” the thread and seem to feel obliged to comment on each and every post as it occurs, even “thanking” posters for dropping by.
And there are normal threads- those where comments or advice or reactions remain relevant to the vast majority of posters, entertaining, useful and pertinent - and I remain grateful for these! !