Geo-strategic irony: Because everyone has a secret nuke lying around, nobody engages in conflicts any more- thus the usual social tension valve beeing unused, leading to civil wars instead of the conventional wars.
TL,DR; Iran vs SaudiArabia turns with nukes into, Iran <-> Iran and SaudiArabia vs SaudiArabia.
TL,DR; Iran vs SaudiArabia turns with nukes into, Iran <-> Iran and SaudiArabia vs SaudiArabia.
Short term gain is long term pain.