Same. And not to be morbid, I've long since accepted Oda, Gosho (Detective Conan), Morikawa (Ippo), and probably Araki will also leave us with incomplete manga/sagas. It is what it is.
Nah bro Araki is built different, one of the mangaka at top of health, a Hamon master turned vampire

Now being seriously, if Araki leaves a incomplete arc is not by lack of work, he will either stop when he believes he just can't draw anymore and end Jojo or he will die drawing this manga.
 
Top