Figured it might be a good discussion question. Originally posted to our friends over at !journaling@sh.itjust.works.
I think of what I have far more as a Personal Knowledge Management System than a journal. I spend far less time on personal feelings and thoughts and “what did I do today?” and a lot more on making it a knowledge repository for Future Me.
As far as I know, there is no way to link to a specific comment in a way that keeps any user on their own instance, only a way to link communities like that. Things might have changed since I last checked.