It's likely Oracle is strategically salting the earth here. Normally it would be foolish to try and disrupt a business on which your own depends to some degree, but with their latest aquisition they now have two enterprise operating systems on offer. Judging by Oracle's corporate personality, it's not hard to see which one is going to become the red-hatted stepchild, and which one the much celebrated sun.
"Unbreakable" might become nothing more than a crowbar to pry customers from redhat folowing the formula, lure them in with lower prices, provide sub-par support and blame it on the uncontrolled nature of 'upstream', 'upgrade' to controlled Solaris.
If it sounds farfetched, consider that the most profitable thing for Oracle regarding their operating system or 'integrated stack' business would be for redhat to stop existing in their current form; not to replace the void with their own support and GNU/Linux offering, but to replace it with what would be marketed as a *real* in-house OS instead.
The bottom line:
Redhat is, as the expression goes, worth more dead than alive to Oracle since the aquisition of Solaris.
The insidious part here is that it's more effective to slowly sabotage from the inside.