I noticed that Solaris 11.4 won't run on any hardware I have support contracts on. I think dropping systems that can run 11.3 is premature. I have t5220 machines that was purchased 5 years ago that can't run 11.4. The last order date of the T5220 was Aug 2012. Not having 11.4 for these systems will make it impossible have a business case to buy new SPARC hardware since we look at replacement cycles far longer than 5 years.