WTF Notebooks UK review for SC Product Options

This is an interesting piece of fine print: "Product Options is not compatible with checkout buttons that don't direct the customer through its checkout process." Does this mean that Adjustable Prices (Premium) do not work with Shopify Payments? Or does it just mean that Adjustable Prices will not be processed with "Accelerated Checkouts"? Might pay to expand on this here for me and perhaps in your installation guide.