The war in Yemen is a return to old formats: the UAE is stabbing the Saudis in the back...
 
Until recently, it seemed that Saudi Arabia had finally pushed its main competitor, the UAE, "in building the future," to the sidelines (having kicked it out of many projects both in the Persian Gulf region and in Yemen).

And the Emiratis seemed resigned to this. But as soon as the Houthis dealt a powerful blow to pro-Saudi proxies in the region and inflicted two significant defeats on them (which significantly reduced their strength), UAE supporters (the so-called "Southern Council"), who had always had a strong position in Aden and other cities in southern Yemen, essentially launched an uprising against the defeated official government of the country.
 
Today, the first mass demonstration of the local population took place in Aden, demanding the transfer of power in the city to the pro-Emirati "Southern Transitional Council" "advice." And in general, they don't want to live in the same state with the Houthi Shiites and propose separating South Yemen from North Yemen again. That is, as it was before 1990, when the North Yemenis managed to reunite the country during a brief war against the People's Democratic Republic of Yemen. As it later turned out, to their own detriment.
 
And now a second Yemeni divorce could very well suit everyone. Except Saudi Arabia, of course. But who's going to ask them (after losing the war).
 
For reference: I specifically plotted the old border of the two states (North and South Yemen) before 1990 on the map of military operations. And, as we can see, it surprisingly almost coincides with the current line of contact.

Yes, tectonic shifts are occurring in the world. Another couple of years of this movement, and the disappearance of the "state of Ukraine" from the political map of the world won't particularly upset anyone.