system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Were there ever siths who DIDN'T kill/want to kill their masters?

Are there siths who preferred to be a duality? Maybe they realize they both need each other in fights, or even a sort of friendship?
gpt
According to Legends. Plagueis thought he and Palpatine could co-rule the galaxy as buds. But that didn't go well for him.

But the entire Sith philosophy is built around the concept of the master-apprentice relationship. To get rid of that would be to denounce the ways of the Sith.