TLDR:
Pixel and Tonic a company that makes Expressionengine addons (arguable the two most popular plugins) created it's own CMS - "Craft". This rather annoys off Ellis Labs (makers of Expressionengine) so much that they add the functionality of P&Ts 2 main addons to the next release of Expressionengine in retaliation.
Although system makers (operating systems, content management systems whoever) regularly incorporate third parties application's functionality into their systems. I've never seen one launched with the message that it was created to punish a third party.
We have both z620s and Dell T7600s (http://www.dell.com/us/business/p/precision-t7600/fs) at work. Apart form the badge you'd be hard pressed to tell them apart. Certainly neither one is better than the other.
Although system makers (operating systems, content management systems whoever) regularly incorporate third parties application's functionality into their systems. I've never seen one launched with the message that it was created to punish a third party.