I wonder whether the 'out of date' refers only to the interface conventions etc., or goes right down to the kernel. It does strike me that with NK's dreadful economy, it probably needs to be able to run on oldish hardware. Even if they can circumvent sanctions to get the latest and greatest components for Kim Jong-Il's personal workstation, or their defense department, most of the country is probably saddled with Pentium IIIs or similar.