Blocks use PHP sessions - not persistent across devices or browsers Session-based cart expires after 24 hours (WordPress default) Product Listing and Orders List blocks require page configuration (Cart/Checkout page settings) Checkout block requires payment gateways to be configured in Invoice Settings No built-in shipping cost calculations (taxes only) No abandoned cart recovery feature (carts lost after session expiration) Orders only visible to their creator (can be viewed by looking up order token) Digital products require email delivery setup for downloads