You seem to confuse things. JAMstack doesn't try to replace SPAs, it's trying to replace Wordpress. It's simply a better choice for websites and blogs than eith

You seem to confuse things. JAMstack doesn't try to replace SPAs, it's trying to replace Wordpress. It's simply a better choice for websites and blogs than either SPA or Wordpress. It really is a different concept than SPA. In pure JAMstack, APIs are used only at the build step, and you don't have to expose them. You get your content such as blog posts from the API, render them to html and store on CDN. Monolithic architecture refers mostly to Wordpress. With JAMstack you separate your CMS from your frontend, and you can manage your content with a service like https://www.contentful.com/ https://www.contentful.com/ that doesn't define how the content gets rendered.