I was thinking of a MMO, where you just kinda lived life. You could either adventure, or you could take up a craft. And not the shitty side crafting jobs in MMOs, but like, you could not touch a sword once if you wanted to and you should have a full engaging experience being a farmer. 'Cause part of the farmer's job is to grow magic ingredients, for the potion maker to make potions, but needs the adventurer to gather monster parts, and the adventurer need armor, so on and so forth. Basically every class/craft could be it's own independent game mechanics and they all worked together and hang out.
I still sometimes thing about this, but maybe not mmo like. Just like you have multiple phone games for these crafts, and when you ask for calls for materials, it can come from other phone games of a different class.