Your entire argument is predicated on building an SPA There are frameworks that don't deliver an SPA - Next, Nuxt, Remix, etc. They also do a lot of work to re

Your entire argument is predicated on building an SPA There are frameworks that don't deliver an SPA - Next, Nuxt, Remix, etc. They also do a lot of work to remove as much frontend JS as they can, and more effort is going in to that delivery architecture at the moment. The idea is that devs write React or Vue based pages, and the framework figures out what the page actually needs and delivers only that code to the user. Routing is done on the server. They work very well.