I don't mean to sound rude, and I apologise if I come across that way, but this is the exact sort of "JavaScript über alles" tunnel blindness that I'm tired of. Sapper/Svelte is _far_ more complex (especially in terms of overhead/learning curve for the site creator) than a tool a user wants to use to create enhanced static sites has any right to be.

Not everything is an app, and frankly I think we build a lot of non-apps as if they are apps because we enjoy the feeling that we've engineered something.