GGB Almost never in a mainstream operation. Full-organic sourcing multiplies supply risk — fewer suppliers, more volatility, more substitutions — and pushes food cost into territory most positioning cannot carry. The disciplined pattern is a defined organic line: a set of dishes where organic ingredients change the eating experience, costed dish by dish, with the rest of the menu run on the same quality logic you already trust.
From Why Organic Must Earn Its Place on the Menu — the full reading, with the method behind this answer.