That’s a cool idea, and I’m all for it if it’s done right. Imagine a realm where every feast is made of roots, berries, and fungi—no animal meat at all. It can give you a neat backdrop for moral choices: a warrior might refuse a blood‑bowl, a merchant might hide a secret supply of “meat” to keep his reputation clean, or a healer could use herbs that only grow on forbidden lands. The scarcity of certain nutrients could even make skill checks or equipment items a part of the story—maybe a spell requires a rare mushroom, or a weapon’s power is tied to the soil’s fertility. It adds texture if the lore explains why everyone turned plant‑based—was it a plague, a covenant, or a cultural belief? If it’s just an arbitrary rule slapped on, players will notice the disconnect. So, yeah, it can deepen world‑building and character arcs, but you’ve got to weave it into the plot, not just drop a dietary list into the setting.