The reason is that the PWA Studio is not at all stable – the architecture is changing every now and then. We cannot really depend on them and it is very far away from production – merchants won’t wait that long. A simple, robust and fast PWA will be the most needed in the market by SMEs. Also, Magento PWA Studio is going to be an expensive affair.
Our integrations are dynamic in nature. The mentioned offerings are the cumulative possibilities of the platform (actual scenarios are specifically organization/business-dependent). For any disparity, please refer to the latest version of the integration brochures.