By definition, a static website does not have a server. Then how, with the JAM stack can we really have a good shopping cart. This talk will have a demo of a system where no dynamic code is written on the server and a fully functional e-commerce website is presented using a static site builder, some APIs and JavaScript.
Not every e-commerce system needs to be as dynamic as Amazon, and therefore should not use the same stack. You can avoid on-call work, constant updates and maintenance efforts when you use a CDN to host your shopping cart and get great performance to go along with it.