Currently all pages are downloaded when entering one page. For big sites (many plugins, many pages, ...) this may be a problem, because large files have to be served.
Adding an option to lazy-load components and pages will be advantageous for bigger sites, so the whole site isn't one big file but many small ones.
Pages and components will then being loaded, when they're needed.
There should be an option to configure, whether "nothing", "pages", "components" or "pages + components" should be lazy-loaded.