The monarchy started to lose absolute power during the Embargo, when the entire family tree got monstrously rich, and the monarchy had to make concessions to the religious leadership during the "Mahdi" seizure of the Great Mosque, otherwise the religious leaders wouldn't approve the use of force.
MbS is a statesman, he's already reclaimed absolute secular authority, and one reason for his large new planned city is to undermine the hold of the religious leadership.
Meanwhile Putin's a gangland leader out to pile up a huge fortune and generally **** with people, the Shiite-head is already an absolute theocrat and responsible for much of worldwide jihad, and Erdogan is the dictator of a dying republic, removing all but the trappings of the multiparty state, and like the other two piling up money in the process.
The Iranian mullahcracy should have been snuffed during the GWB administration, which also should have eschewed attempts to stabilized Iraq -- removing Iran's mullahs would have been a more effective route of that, but ultimately, who cares, provided we wipe out enemies of the US.
Agree.