Earlier quoted context omitted.
Google Plus was so heavy that it barely ran on my old netbook with 4 Gb of RAM. I think that if it had looked a bit more like Craig's List it would have had a much better chance of success. (seriously) The Web needs an anti-bloat movement where animation is minimized and documents are mostly server-rendered.
No to the latter. Instead please extend HTML with useful entries and stop using Javascript for layout and handling connections and refreshes. What you said suggest the use of migrated like Google AMP. Server side had no idea how things are supposed to be rendered. Trying to force it via JS is an extra crock.
Server side has an idea on how things are supposed to be rendered for content-based documents.
Games and complex apps need JS, but readable documents don't. Not everything should be "an app".
Animation is often not accessible and it's a problem that needs to be fixed.