As an infrastructure guy...
...I loved the Oracle Database Appliances. I sat down with our lead apps guy, went over the configuration worksheet with an Oracle engineer on the phone, then spent a couple hours doing the rack and stack and networking configuration. After that it was a complete hand off. Old servers powered down and unracked, several TB recovered from production NetApp storage, a lot of finger pointing removed, and more importantly from my perspective was containing the apps team to a small footprint of hardware which was still more than enough to meet their needs and came bundled with it's own support AND hypervisor to screw up. Really all I needed to do from that point on was give them access to a Data Domain for RMAN backups and make sure no one unplugged anything. Easy breezy, lemon squeezy.