system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] I've often heard characters refer to a ship as the "newest" or "most advanced". What systems are receiving the most incremental improvements from generation to generation?
gpt
Propulsion systems are almost always the greatest focus.  

While all other systems can receive upgrades and enhancement incrementally, it's a ship's Warp efficiency rating and output which is a real determination of a ship's relative advancement against all other ships. 

Finding new ways to increase output or decrease loss of efficiency which might draw from a ship's Warp core is the root of all starship systems  development.

Upgrading a ship's sensor array simply means enhancement of current capabilities.  Impressive. 

Upgrading a ship's data transport subsystem is an indication of faster data access which decreases power consumption...no surprise there.  Expected.

Upgrade a propulsion system generation so an unmodified version goes from the previous generation's 7.3 to a scorching 8.1 with no decrease of mass, or other corner cutting in design?    State of the art.