Layouts with diagonal sections are quite popular for several years now. You will probably not find it in the articles titled "Design trends for 2020". It is one tool designers can use to bring some dynamic to all the rectangular boxes with boring 90-degree angles.
Server side rendering (SSR) and Static Site Generation (SSG) are two ways to create websites using a modern front-end stack (getting content from a server API) while preserving SEO friendliness and perceived performance.
Fetch wasn’t abortable when it was initially introduced. the initial GitHub issue for aborting a fetch request was opened initially in 2015. There were also many attempts to solve this problem outside of the fetch spec like cancelable-promises and other hacks.
Don’t block the UI thread, don’t make the laptop’s fan spin, don’t drain the phone’s battery, etc. We traded better interactivity and “app-like” behavior for a new class of problems that don’t really exist in the server-rendered world.