I couldn't find it on the website, is there a detailed list of the changelog for this beta? Looks like some really great changes were made, but would love to see specifics.
We're working on an upgrade guide, but in short, it's a completely different library. Major difference is that routes are actual components that are actually rendered, where before they just had their props stripped and plugged into the routing machine. Now your routing is composed like the rest of your react app.