update/tidy docs intro

Author: Rich-Harris

documentation/docs/00-introduction.md

@@ -6,7 +6,7 @@ title: Introduction
 
 > SvelteKit is in early development, and some things may change before we hit version 1.0. This document is a work-in-progress. If you get stuck, reach out for help in the [Discord chatroom](https://svelte.dev/chat).
 >
-> See the [migration guides](migrating) for help upgrading from older versions.
+> See the [migration guides](migrating) for help upgrading from Sapper.
 
 ### What is SvelteKit?
 
@@ -19,21 +19,6 @@ Building an app with all the modern best practices — code-splitting, offline s
 
 You don't need to know Svelte to understand the rest of this guide, but it will help. In short, it's a UI framework that compiles your components to highly optimized vanilla JavaScript. Read the [introductory blog post](https://svelte.dev/blog/svelte-3-rethinking-reactivity) and the [tutorial](https://svelte.dev/tutorial) to learn more.
 
-
-### Why the name?
-
-SvelteKit is meant to be a full kit of everything necessary to build a Svelte application.
-
-
-### Comparison with Next.js
-
-[Next.js](https://github.com/zeit/next.js) is a React framework from [Vercel (formerly ZEIT)](https://vercel.com), and is the inspiration for SvelteKit. There are a few notable differences, however:
-
-* SvelteKit is powered by Svelte instead of React, so it's faster and your apps are smaller
-* As well as *pages*, you can create *server routes* in your `src/routes` directory. This makes it very easy to, for example, add a JSON API such as the one powering this very page (try visiting [/docs.json](/docs.json))
-* Links are just `<a>` elements, rather than framework-specific `<Link>` components. That means, for example, that [this link right here](/), despite being inside a blob of markdown, works with the router as you'd expect
-
-
 ### Getting started
 
 The easiest way to start building a SvelteKit app is to run `npm init`: