Lifespans many be dramatically extended, but it’s going to take a monumental change in our understanding of physics to actually end death. Second law of thermodynamics directly means the universe will eventually be completely devoid of life.
If nothing else, if I got bored after x number of centuries, I'd want any useful/meaningful memories of mine to be indexed and saved on hyper-wikipedia rather than just be burned because a piece of meat rotted.
Also, as tech advances, the need for slow recombination goes away, as people can alter their genes and body on the fly. Supersede natural evolution, rather than bowing to it.