How do you people feel about modpacks that need to be multiplayer and are group based?

I've been wondering about this for a while since i don't see many people talking about it. How do you guys feel about modpacks that have to be multiplayer to work? I've been developing a pack that focuses on exploration, combat and defense, but the progression is split through classes so solo play(at least early game) is quite impossible since classes cant be switched. I just haven't seen any packs that would encourage teaming up with players. In my opinion it sounds fun. What about you?