It used to be with Sun Hardware that there was an End of Support Life Date at which Sun would no longer support older hardware with scarce replacement parts.
I guess Oracle is now calling it the Last Support Date. But, to me, it is unclear when this is. The Premier Support specifies lifetime support of the OS and firmware for many systems but availability of parts and time to repair are not clearly spelled out. When I was supporting customers as a Sun SSE, for ten years, we had clear language the said to the customers any repairs of older systems beyond a specific date was to be Best Effort.
I need this clearly spelled out so I can either request, through my company, a hardware refresh or just continue with Premier Support.