The objectness of things has a very fast turnover rate.
nearly all things are born live and die.
life-support can go on for a long time.
I don’t have a problem with this because I don’t think any of our cells are original.
functioning however can be.
if it functions in an identical matter…
and there is reasonable continuity…
I would consider it the same as a whole system.
as parts considered separately from the whole? well that brings up a related but distinct discussion.