I heard that the All feed aggregates content from all communities that instance members have subscribed to, meaning if I subscribe to a new community, it’ll start showing up in everyone else’s All feed.
Let’s suppose I have an account on an instance with a particular thematic focus. Should I avoid subscribing to communities outside of that theme, in order to preserve the purity of their All feed?
I would say that it’s too early for anyone to know what a more solidified etiquette will be. So for now just do whatever you want so long as you pay attention to any changes in public opinion or rule changes.