Dune also had a mass "forgetting" of technology, and a faction trying to preserve it: the Butlerian Jihad and Ix (and Richese), specifically.
Not quite.
Dune is a complicated case, and i'm not sure it is analogous to BT really, when it comes to tech.
The Butlerian Jihad was a crusade against machine-mindedness, not just machines. Since that was followed by a feudal empire, technology was basically restricted as it would have upset the status quo.
Later events (namely, the God Emperor) force technological development, to prevent such long status quo and stagnancy ever forming again.
Ix and Richese and Bene Tleilaxu were places where advanced technology was left but it was restricted. The ruling class liked some toys... and i figure it was a symbiotic relationship. Rulers protect the tech societies, and they help keeping rulers in power.
The ComStar trying to keep the status quo kinda matches things but it was done for quite different reasons ultimately.
This is my interpretation, and i will subscribe to it strongly, having been a Dune fan for so very long.