Four diverging codebases → one shared theme, market level overrides.
Four storefronts ran four diverging codebases, and one team was maintaining all of them. Every fix had to be made four times.

A multi market retailer
One shared theme architecture with market level overrides, so a change ships once and every storefront inherits it.
A fix now ships once, and all four storefronts get it.
Online Store 2.0 theme, metaobjects, Shopify Markets
You sell in several markets and keep a separate theme, or a drifting copy, for each one.
Redrawn for privacy



Facing the same constraint?
Tell me how it shows up in your store, and I will tell you the sensible next step.