You can just customize the existing modpack, but you gain already working configuration for all these mods, and nah, the quests are parts of modpack, so cant just slap them in. If you play alone it does not matter, but with 20 people it would just be mess and most of people would be lost and give up

Eeee nah, making own is 200x more work, the quests, some balancing, extra custom content from big brand modpacks like this. Having ATM star as a goal is cool and makes people work together. Easier to fix existing modpack, as its mods and Minecraft that is bad quality, not modpacks themself.

Now time for a nuke

残念ながら、このプラットフォームにはあまり興味がないようです。誰も私の招待状を欲しがりません！でも、ついに一般公開されたらもっと簡単になるでしょう....