Hybrid AC + Plus, anyone actually doing this?

A two-platform design can be considered when business units have a specific need for separate commerce operations. Document who owns product data, inventory, customer identity, company pricing, orders and returns across both systems. Rehearse synchronization failure and customer-service handoffs, and budget for two release and support processes. Compare this design with a single-platform alternative. No count of brands, minimum sales volume or claimed migration experience is needed to justify the assessment.

Official references: Shopify Admin API; Adobe Commerce and Magento APIs.