I feel a big advantage to NOT bringing them all together into one service is multiple leadership groups, so that if one becomes fascist it’s easy for people to simply move to another. Certainly as a long time redditor when reddit started its fascist garbage I kinda freaked out. I didn’t know where to go to get my “fix”. Now I still get the variety (and more every day), and if the devs for my primary group get power hungry I know some options.