I am building an ordering system for a client and have been reviewing checkout flows. While I like the look of slide out cart modals and a checkout modal (similar to Bolt and ones you see on Shopify) I cant help but think that if I should follow anyone's example, it should be Amazon. Since they are the biggest e-commerce store I would assume they invested a lot of money into the best way to get conversions. Pages also seem better for mobile possibly over modals.
No real technical question here, just thought it would be interesting to hear peoples thoughts.