I would love a feature that allows me to ignore new replies to a post or comment I make. Apollo had this feature for Reddit and I found it really helpful to not get notifications to threads I wasn’t interested in continuing for whatever reason (maybe it was getting a lot of off topic replies, or someone was arguing and I didn’t want to continue to engage, etc.). Essentially it would just disable notifications from a chosen post, ideally triggered as an option in the three dot overflow menu on that post/comment.
It’s easy to see this being useful in political discussions, for example. On Reddit, it was not infrequent that I’d wind up arguing in pointless circles with multiple right-wingnuts, so I’d want to leave my rebuttals to their BS up for anyone else to see, but otherwise be done with the conversation.