Web apps ignoring these types of conventions are fine, but the key issue is that a lot of sites aren't web apps/don't need to be web apps yet are built like the

Web apps ignoring these types of conventions are fine, but the key issue is that a lot of sites aren't web apps/don't need to be web apps yet are built like they are regardless. For example, your average news site. So many of them are built as single page applications with JavaScript frameworks like React or Angular, and for what purpose? None. At their core, they're basically blogs. They would work much better with traditional server side rendering and standard page loads and what not. Same with stuff like Reddit. At it's core, its just a set of forums, with the vote button and a few other minor aspects being the only thing that could possibly benefit from JavaScript. Same with Wikia, which seems to have forgotten its a wiki host and not an application platform. And the list goes on and on. Why? Probably because either the management team like to think they're 'on the forefront of web technology', ala Google or because the developers wish they were working for Google/Facebook/whatever. Many sites really are seriously overdesigned and over engineered.