Join the Fediverse:Proposal for new stucture

I'm trying to restructure the wiki a bit and then create more content to answer the most basic questions people have about the Fediverse.

Finished changes

Namespaces: We now have 2 new namespaces. Draft and Archive. You can find e.g. Draft:Captions and Archive:Mastodon features explained in the new namespaces.
Article titles: I renamed all articles that were titled "What is...?" or "What are...?" to the more simple title, e.g. Mastodon instead of What is Mastodon? (which redirects to the former though).
Categories: I removed some categories like the "What is" category and added a few new ones, like Category:Usage.

I'm drafting a new Fediverse article where you can find answers to basic questions in a more structured way. Draft:New Fediverse Article
The Main page should already have a section explaining what the Fediverse is.
I'll add redirects for all major social media platforms that lead either to the most common Fediverse replacement or to a list of Fediverse services of the same type. E.g. Twitter could redirect to Mastodon or List of microblogging services.
I'll edit the sidebar to contain these items Main page, The Fediverse (What is it?, How do I join?, How do I use it?), This wiki (About, Navigation, Categories, Editing/Translating), For Editors, Guides & Guidelines, Todos, Special pages, Help about MediaWiki, Recent changes
What people usually tell you about the Fediverse, Getting started with your Fediverse account, Welcome to the Fediverse Quickstart guide might be renamed or split/merged with different articles.