system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Did Palpatine ever learn the secret to immortality from Darth Plagueis, or did he plan to die naturally one day?

I've always wondered if Palpatine planned on dying eventually and, as far as the current canon is concerned, destroying his own Empire once he wasn't around to have his fun anymore. It's never mentioned if he learned the secrets to biologically eternal life from his master, and Palpatine is an older gentleman (88 by the time of the Battle of Endor) so it seems like he's destined to croak one day. The average human lifespan in Star Wars used to be in the low 100s, even 200s or higher if you were Force-sensitive, but that still puts a relatively limited timescale on the longevity of an entire Galactic Empire which replaced the several-thousand year run of a Galactic Republic.
gpt
There is quite alot of literature on this topic, especially comic books.  The very short answer is the reason Palpatine was so interested in clones is he figured out how to take over a body after his death. So he clones himself and pretty much lives forever.  The hero's win the day and kill off all the clones but yeah there is a whole comic book series devoted to what happened to Palpatine after his death.