Ribbonfarm.com, A Text Renaissance
On the surface, Roam looks like a cross between a slightly weird wiki and a note-taking tool like Evernote. It’s not. It implements a few key features of 1980s vintage hypertext visions — block-level addressability, transclusion (changes in referenced blocks being “transfer-included” wherever they are cited), and bidirectional linking — that utterly transform the writing experience at the finger-tips level.
I’ve been using Roam for a while and have pretty much transferred all of my private information gathering and knowledge processing into it from Tiddlywiki. The description above is the best I’ve seen yet of why I like Roam.