LWR application model benefits for B2B stores
Key Takeaway
B2B Commerce stores run on LWR on top of the Salesforce core platform. An Aura-based store must migrate to an LWR template before it can use LWR-only features such as High Scale Orders.
B2B Commerce stores run on the Lightning Web Runtime (LWR) application model, a framework built for speed. LWR sits on the Salesforce core platform, and that platform is the main value to explain when you position B2B Commerce. All new B2B stores are built on LWR. Older Aura-based stores can't use several newer features, so an admin needs to know which model a store uses.
What the LWR application model is
The Commerce app runs on the LWR application model, an LWR-only application framework designed for speed and sustainability. LWR takes care of routing and data loads. Built-in data binding and performance optimizations come out of the box. LWR also gives you reusable, web-based components.
LWR uses the same architecture that Salesforce has used for years to scale Lightning, Communities, and Mobile. LWR is engineered for performance. To get that performance, the browser executes more code itself instead of running JavaScript abstractions.
LWC is built on modern web standards: ES5+, custom elements, classes, modules, and imports. Because LWC uses these standards, any JavaScript developer can build a Lightning component. For the same reason, developer resources are easy to find.