In my first and worst ED round back in 2020, I was unable to make an account on this website (it just never confirmed my account) so I had to resort to those subreddits to interact with ED communities (and edtwt for a short while, but we don't talk about that....)
I liked them honestly, it was a nice time. I made posts often. At the time I was at my lw and my mom was seriously worried, and I was miserable. I learned about all-in recovery through r/EDanonymous. I looked more into it, and after a while I decided to take the leap. It was hard, but ultimately it worked, I got to a healthy bmi (my health weight), lost interest in food, and was finally able to get my life back.
During my refeeding stage I posted my progress on the subreddit, I was very happy and everyone cheered me on.
The problem was that I was not followed by any professional and did it all on my own, and that made me not fully recover without realizing. While my body and conscious state were recovered, my subconscious wasn't and I kept one or two behaviors (namely bodychecking), which, after 1 year of being healthy and thinking I was fully recovered, caused me a relapse.
Having done it thanks to the subreddit, I do believe in all-in recovery, but not all by oneself. Anyone who tries it still needs a support system. Had I had one I think I wouldn't be here right now.