So the big question Ive always had was the purpose of the scene in the chapter "The Weight of Memory" (1072). The entire reference of that scene was a that it was a written spoof on the 21 grams experiment here:
https://en.m.wikipedia.org/wiki/21_grams_experiment#:~:text=he was rejected.-,In popular culture,21 Grams references the experiment.
But seriously, read this:
While not direct, Vegapunk equates death to losing the soul. Kuma losing his memory has been referenced as him being killed or dying repeatedly. He even directly implies that his memories (and soul) can be wirelessly transferred into another body.
Imo, there are 2 big options I see with Kuma if his original body dies:
1. Vegapunk transferred his memories into the Ancient Robot. He was found appearing outside the body when he was introduced...why?
2. My more hopeful opinion since I still snort the Kuma nakama copium: Vegapunk completely cloned Kuma unmodified and is adding his memories (read: SOUL) into that body.
So yes, Kuma as he is will die, but there is a strong chance he will be reborn since VPs memory experiments were about proving the soul exists through memories, which Kuma made a copy of.
And yes, Bonney used up that memory bubble, but Vegapunk confirmed this chapter that hes been analysing that memory bubble without making it disappear (and he's had 2 years to do it).
Just my 2 cents on it, Im still not off the Kuma train.