How to run well on a wide range of phones and networks is a big challenge. The PRPL approach of preloading wastes bandwidth, and is a hard pain point for people

How to run well on a wide range of phones and networks is a big challenge. The PRPL approach of preloading wastes bandwidth, and is a hard pain point for people who pay by bandwidth. Yet the load-on-demand approach is perceptually slower. Svelte and Sapper get pretty close to what PRPL is describing, including much of the guidance of Next.js & Nuxt.js. What can help? Browser hinting is one approach. Browser settings that make it easy to accept/reject irrelevant content are another approach. Browser proxies with compression and filters are another. IMHO success looks like the user's agent/browser/phone/desktop saying "Please use this kind of quality of service profile for now, and send what's most relevant."