If you think all the stores in the internet now are PWA’s you are sadly mistaken. MVC web apps are pretty well suited for things like shops and they never went away. There are entire languages and frameworks like PHP, Python, Java that actively support that style of app. It also lends itself really well to caching.
I wouldn’t say it’s completely JavaScript free though. Client side JS is still extremely useful and attempting to make a store with zero JS might be a bit tough.