system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Were there REALLY only two sith?

So the rule of two states that there are only two sith, master and apprentice.  But the existence of sith holocrons seems to indicate that even long dead sith could continue to "teach" new apprentices.

These sith holocrons are scattered throughout the Galaxy.  Therefore, isn't it entirely possible that the sith could have more than one cell of master/apprentice at a time, each one drawing the source of its sith philosophy from one of these ancient holocrons?
gpt
The Jedi and the Republic hunted down all the Sith they could find, with Darth Bane being the last known Sith Lord before the Clone Wars. With the deaths of Darth Sidious and Darth Vader, the lineage of the Sith has come to an end. Most of the Sith Holocrons and knowledge was kept away from those who would use it, the Jedi hid a number of holocrons in a vault in the Coruscant Temple. Palpatine's own personal collection, housed in the *Scimitar*, was destroyed between the events of ANH and ESB. There might be other collections out there somewhere, but that doesn't mean that there are any other Sith.

Legends had Sith from other traditions that didn't follow the Rule of Two, and thus the Sith never truly went away in that continuity.