add faq; remove whats-the-catch

README.md

@@ -21,7 +21,7 @@ same results. It's simply faster. There is no catch.
    2. [For new users](#for-new-users)
    3. [Docker playground](#docker-playground)
 3. [How fast is it?](#how-fast-is-it)
-4. [What's the catch?](#whats-the-catch)
+4. [Known bugs](#known-bugs)
 
 ## Installation and configuration
 
@@ -38,6 +38,9 @@ git clone https://github.com/romkatv/powerlevel10k.git ~/powerlevel10k
 echo 'source ~/powerlevel10k/powerlevel10k.zsh-theme' >>! ~/.zshrc
 ```
 
+If you are using a framework / plugin manager and need help translating these instruction into its
+configuration language, see [FAQ](http://fix.me/).
+
 Make sure to disable your current theme.
 
 ### Extra configuration
@@ -179,22 +182,70 @@ POWERLEVEL9K_STATUS_OK_BACKGROUND=grey53
 Powerlevel10k shows similar performance advantage over Powerlevel9k on Mac OS, FreeBSD, WSL, and
 Raspberry Pie.
 
-## What's the catch?
+## Known bugs
+
+When a notification about an exiting job is displayed, prompt content doesn't get refreshed.
+In Powerlevel9k it does. This could be fixed but the fix will add non-trivial complexity and
+extra prompt latency.
+
+## FAQ
 
-Really, there is no catch. It's literally the same prompt with the same configuration format as
-Powerlevel9k. But **much faster**.
+### Why does Powerlevel10k spawn two extra processes?
 
-If you really need to know, here's where Powerlevel10k differs from Powerlevel9k:
+Powerlevel10k uses [gitstatus](https://github.com/romkatv/gitstatus) as the backend behind `vcs`
+prompt; gitstatus spawns `gitstatusd` and zsh. See [gitstatus](https://github.com/romkatv/gitstatus)
+for details.
 
-  * Git prompt doesn't show tags and revisions. Open an issue if you need them.
-  * By default only git vcs backend is enabled. If you need svn and hg, you'll need to set
-    `POWERLEVEL9K_VCS_BACKENDS`. See [Extra configuration](#extra-configuration).
+### Does Powerlevel10k always render exactly the same prompt with the same config?
+
+This is the goal. You should be able to switch between Powerlevel9k and Powerlevel10k with no
+visible changes except for performance. There are, however, several differences.
+
+  * Git prompt in Powerlevel10k doesn't show tags and revisions. Open an issue if you need them.
+  * By default only git vcs backend is enabled in Powerlevel10k. If you need svn and hg, you'll
+    need to set `POWERLEVEL9K_VCS_BACKENDS`. See [Extra configuration](#extra-configuration).
   * Fewer configuration options can be changed after the theme is loaded. For example, if you
     decide to change background color of some segment in the middle of an interactive session,
     it may not work.
 
-## Known bugs
+### Are changes getting up/down-streamed?
 
-When a notification about an exiting job is displayed, prompt content doesn't get refreshed.
-In Powerlevel9k it does. This could be fixed but the fix will add non-trivial complexity and
-extra prompt latency.
+Powerlevel10k regularly pulls changes from Powerlevel9k, so all bug fixes and new features that land
+in Powerlevel9k will land here, too.
+
+There is ongoing work on upstreaming some of the changes from Powerlevel10k to Powerlevel9k. E.g.,
+issues [1170](https://github.com/bhilburn/powerlevel9k/issues/1170) and
+[1185](https://github.com/bhilburn/powerlevel9k/issues/1185).
+
+Improvements to [libgit2](https://github.com/libgit2/libgit2/issues/4230#issuecomment-471710359) are
+being upstremed. There are 3 independent optimizations and it's not yet clear whether all of them
+will make it but there is a good chance they will.
+
+### Is there an AUR package for Powerlevel10k?
+
+Yes, [zsh-theme-powerlevel10k-git](https://aur.archlinux.org/packages/zsh-theme-powerlevel10k-git/).
+This package is owned by an unaffiliated volunteer.
+
+### How do I use Powerlevel10k with zplug, prezto, oh-my-zsh, antigen, somethingelse?
+
+If you have to ask, then the easiest way is to disable the current theme (so that you end up with
+no theme) and then install Powerlevel10k the usual way.
+
+1. Disable the current theme in your framework / plugin manager.
+
+  * **zplug:** Open `~/.zshrc` and remove the `zplug` command that refers to your current theme. For
+    example, if you are currently using Powerlevel9k, look for
+    `zplug bhilburn/powerlevel9k, use:powerlevel9k.zsh-theme`.
+  * **prezto:** Open `~/.zpreztorc` and put `zstyle :prezto:module:prompt theme off` in it. Remove
+    any other command that sets `theme` such as `zstyle :prezto:module:prompt theme powerlevel9k`.
+  * **oh-my-zsh:** Open `~/.zshrc` and remove the line that sets `ZSH_THEME`, such as
+    `ZSH_THEME=powerlevel9k/powerlevel9k`.
+  * **antigen:** Open `~/.zshrc` and remove the line that sets `antigen theme`, such as
+    `antigen theme bhilburn/powerlevel9k powerlevel9k`.
+
+2. Install Powerlevel10k the usual way.
+
+```zsh
+git clone https://github.com/romkatv/powerlevel10k.git ~/powerlevel10k
+echo 'source ~/powerlevel10k/powerlevel10k.zsh-theme' >>! ~/.zshrc
+```