Shopify has released many versions of Shopify Dawn Theme that uses JSON to make most of the comman template dynamic, that enables the store owners customize Shopify store mostly on their own.
Shopify Dawn Theme Version 2.0
Have a look at the very first Dawn OS 2.0 theme JSON template customizer.
Shopify Dawn Theme Version 3.0
Shopify just released Shoify Dawn theme version 3.0.0 that you can find from Shoify github releases page. Shopify also released other Shopify themes based on Dawn theme – Sense, Taste, Craft, Studio, and Crave, these themes also based on Dawn theme.
Shopify Dawn Theme Version 4.0
Shopify Dawn Theme version 4.0.0 was just released after releasing five OS 2.0 themes based on Dawn theme.
Dawn Theme Version 5.0
Shopify Dawn theme version 5.0 comes with mega menu and cart drawer that you generally get with Shopify premium themes..
Dawn Theme Version 6.0
Here comes the Dawn Theme version with Mega Menu, Cart Drawer, and many more bug fixes that you can upgrade your store to for free. But there are not much setting options for Mega Menu and Cart Drawer. Dawn v 6.0 theme comes with premium features that are not yet feature rich but with basic working capabilities.
Here is a quick video – a first look at Dawn Theme version 6.0