You are correct, of course. Four hundred posts is a good place to stop.

If you think this - and as no one is forcing you to continue - you are of course free to stop reading and posting to it - then as far as you are concerned - this thread will have stopped.

Perhaps you will accept that if others should wish to continue posting to any thread in your absence that is their choice?

Why should a thread remaining open bother you, or be subject to anyone else's judgement and why do you think you should you be encouraged to deny other posters their choice?