If you like this, check the previous articles. Lots of good stuff, including one on Yemen war a couple of days ago.
Yemenis are giving the Saudis a thrashing. Looks like the extravagant sums the House of Saud spent on its weapon systems, relative to poor Yemen, isn't helping much.
If it's any indication of how well they will fare against a confrontation with the future Russian/Iranian/Iraq/Turkish coalition, I'd suggest they've already lost.