Ya, that’ll keep Austria Hungary around a while longer Balkans already the powder keg of Europe still primed and ready to blow after the first 2 wars they’d already had at the start of the 20th century.
Oh Ottoman Empire gets to have a bit more time on life support, that’ll be fun at least we might not have to deal with the Sykes–Picot Agreement where the UK and France carved up the middle east into most of the shape it’s currently in.
Iran would be about the same, Persia’s been Persia for a long time but most of the rest of the region would have devolved into some kind of civil war while the different factions did their things eventually setting their own borders based off linguistic and cultural similarities instead of where the UK and France wanted to exploit for resources.
Might have been able to avoid the October Revolution in Russia that led to the Soviet Union though, no super deadly war causing dissent in the ranks aimed at the Czar no need for the kaiser to hand Lenin a briefcase full of money to go start his revolution and get the Russian army to go home so the eastern front wasn’t a thing.
Wouldn’t have wound up ticking of Ho Chi Minh by casting him and the other folks from Vietnam off and ignoring them, stuff with Japan too.
Incredible number of incredibly terrible things in the world that could have been avoided if they had just arrested and hung the dude that killed the Archduke and it go at that.
But the generals and kings had all these fancy new weapons and ways of killing people that they wanted to try out, no matter what the cost present or future.
Sorry, I really hate WW1. It never should have happened, should have been a regional dust up, and would have been if not for the generals and kings.