I'm not going to try to beat wikipedia and google at their game, but I can try something like what if your MUD / text adventure was more mod-able than minecraft?
The experience of playing around on them in the 90s reminds me strongly of the linked article's ideas.
A reader will always follow a path and every path is a single story. Like how you are not aware of other parallel universes. So I still think it's more of the hardware that's being reimagined. You just flip the book differently.
About your two friends, it sounds like intuition. How do you think it relates?
Svbtle's great for some people and Medium's better in some ways. It's like comparing Blogger with WordPress. The future is in content-centricity and interface-simplicity. Let's appreciate these guys for leading the frontier.
PS: This one is more in tune with how the brain works. Pretty radical idea for a writing interface. https://vimeo.com/66995098