Explicitely state the book doesn't have instructions for Systemd.

book/foreword.xml

@@ -12,10 +12,16 @@
   <title>Foreword</title>
 
   <para>
-     This version of the book is meant to be a separate book from LFS
-     and BLFS entirely but meant to be used in conjuction with BLFS.
-     This is meant to be built on Thomas' Multilib mirror with
-     modifications.
+    This version of the book is meant to be a separate book from LFS
+    and BLFS entirely but meant to be used in conjuction with BLFS.
+    This is meant to be built on Thomas' Multilib mirror with
+    modifications.
+  </para>
+
+  <para>
+    This book is also meant specifically for LFS systems not using Systemd.
+    It uses SysV bootscripts but if you get bootscripts meant for init system,
+    or make your own, then the instructions will work just as well.
   </para>
 
   <para>Enjoy!</para>

introduction/welcome/changelog.xml

@@ -39,6 +39,16 @@
     </listitem>
     -->
 
+    <listitem>
+      <para>July 6th, 2024</para>
+      <itemizedlist>
+        <listitem>
+          <para>[Zeckmathederg] - Explicitely state the book doesn't have
+          instructions for Systemd.</para>
+        </listitem>
+      </itemizedlist>
+    </listitem>
+
     <listitem>
       <para>July 5th, 2024</para>
       <itemizedlist>

introduction/welcome/important.xml

@@ -13,13 +13,33 @@
   <para>
     BLFS has more information regarding compilation, /usr vs /usr/local,
     boot scripts, etc. at 
-    <ulink url="https://linuxfromscratch.org/blfs/view/stable/introduction/important.html"/>.
+    <ulink url="&blvs-svn;/introduction/important.html"/>.
     Unlike this book, this would be a chapter in BLFS.
     A lot of that information has been omitted as this book is more linear
     and doesn't follow how BLFS follows. However, we will cover some bases
     here.
   </para>
 
+  <sect2>
+    <title>Init System</title>
+
+    <para>
+      This book doesn't have instructions for Systemd. It is meant for SysV
+      LFS systems, but if you find or make your own bootscripts, you can
+      use the instructions in this book on a system that has Runit or
+      OpenRC. Systemd will take more work and the process involves checking
+      <ulink url="&blfs-svn;"/> and compare the instructions for each package.
+      There aren't many packages that require this process except ones that
+      may need to be started as a service. <xref linkend="dbus"/> is especially
+      different so watch out for it if you are using Systemd. The reason for not
+      using Systemd is that Systemd makes things more complicated, a lot of users
+      use more simplistic init systems like SysV for their LFS system, and including
+      instructions for both can result in two book versions which would be
+      rather inconvenient.
+    </para>
+
+  </sect2>
+
   <sect2>
 
     <title>Building software</title>