I just need to work out exactly what the effect of the user-configured node block is. In principle, if an LW user replies to either my thread or one of my comments in someone else’s thread, I would still want to see their comments and I would still want a notification. But I would want all LW-hosted threads to be hidden in timelines and search results.
On one occasion I commented in an LW-hosted thread without realising it. Then I later blocked the community that thread was in (forgetting about my past comment). Then at one point I discovered someone replied to me and I did not get the notification. That scenario should be quite rare but I wonder how it would pan out with the node-wide blocking option.