SFCC's architecture is proprietary and often described as rigid. Simple changes can require lengthy deployment cycles. The "SiteGenesis" or "SFRA" architectures are heavy and often struggle with Core Web Vitals. Hyvä gives complete control over the frontend. There is no "platform core" that cannot be optimized. Merchants leaving SFCC often cite the inability to achieve green Core Web Vitals scores; Hyvä solves this out of the box.

The proprietary nature of SFCC means that code written for it is not portable. Data access is often gatekept behind APIs, making migration difficult. The customization model is restrictive compared to the open PHP architecture of Magento. With Magento, you own your code, your data, and your customizations.