Of course I'd love to hop on a Letterboxd version of Funkwhale or Bookwyrm! Not everyone has the skills or spare time to whip it up & maintain it.
Letterboxd is a way for me to subscribe solely to people I talk to. The RSS feeds are good, shows logs, ratings, reviews, I figure the timeline is about the same. I don't even go to the actual movie pages except to log something, & roll my eyes at a top level review occasionally, when I hate myself.