So far I use: Matrix, Friendica, Lemmy, PieFed. I also follow 1 or 2 persons on Mastodon, using Friendica.
I want to try vutuv now. Maybe in the future some more services.
Now I wonder if I should really register a new account for each service. May I ask for your advice? What do you recommend?
It is not mandatory but more a nice to have thing.
Of course you can always create an account on another instance when your home instance disappears / has issues.
But for convenience reasons you should create it before this scenario happens.