Recompiling a kernel is no longer a rite of passed for nearly all BSD

users; only advanced users now compile kernels.  Expand rationale for
building a custom kernel: unused features still take up memory that
could be used by applications.

en_US.ISO8859-1/books/handbook/kernelconfig/chapter.sgml

@@ -96,7 +96,7 @@
       dynamic loadable kernel module for that functionality.</para>
 
     <para>Building a custom kernel is one of the most important rites of
-      passage nearly every BSD user must endure.  This process, while
+      passage for advanced BSD users.  This process, while
       time consuming, will provide many benefits to your &os; system.
       Unlike the <filename>GENERIC</filename> kernel, which must support a
       wide range of hardware, a custom kernel only contains support for
@@ -112,9 +112,11 @@
 
       <listitem>
 	<para>Lower memory usage.  A custom kernel often uses less memory
-	  than the <filename>GENERIC</filename> kernel, which is important
-	  because the kernel must always be present in real
-	  memory.  For this reason, a custom kernel is especially useful
+	  than the <filename>GENERIC</filename> kernel by omitting unused
+	  features and device drivers.  This is important because the kernel
+	  code remains resident in physical memory at all times, preventing
+	  that memory from being used by applications.
+	  For this reason, a custom kernel is especially useful
 	  on a system with a small amount of RAM.</para>
       </listitem>