Is there a way to turn off notifs for posts that you dont want to hear about replies anymore from but that you think should stay up as a valuable forum for discussion (just dont want to be updated)

Sometimes I really want to just delete a post but I think thats a bit heavy-handed and I keep hoping theres a way to simply mute it so its not disrupting me when I've moved on from it but dont want to invalidate all the repliers and also posterity

I've always been about starting or igniting discussion but I dont really care to always be so attached at the hip to every topic I start till every bloody end