In one generation their oil will be worth far, far less than now and all countries which have their economies based on nothing else will collapse. SA’s exports are more than 75% hydrocarbons and derivatives. 57% is crude oil, unrefined[1]. Given that Saudis do little productive work now, mostly working in government sinecures or set asides in companies where foreigners do the actual work there’s little reason to believe they could deal with a massive drop in export value.

https://oec.world/en/profile/country/sau?subnationalFlowSele...