Originally Posted by wlmeng11
Well since this guide is primarily aimed towards users who only want to root their phone, rather than developers, adb/fastboot is really all you need.
So it would save time to just use an adb/fastboot combo.
Indeed, though this method allows you to update your adb and fastboot via Android SDK Manager (ASM). Also, in cases where all you need is adb and fastboot, you can speed up future update checks by going to "Tools"->"Manage Add-on Sites..." in ASM and click on "Disable All" button in "Official Add-on Sites" tab. From there on Android SDK Manager will check only the default repository containing tools and APIs.