system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40K] Has any aspect of the Imperium improved since 30K?

Like for instance, the Custodes have been holding back a hellmouth for 10,000 years right? Does that mean they're extra hardcore now? Is there anything the 40K Imperium does better than the 30K iteration?
gpt
Standardization, in 30k each capital ship for example was a unique piece of engineering that required its own unique components and training for its crew, and if it where from a different system it would sometimes be built with entirely different technologies that would be as different to other Imperial ships as those of another faction.  

In 40k more STCs have been rediscovered and they are uniformly spread throughout the galaxy, a Lunar-class Cruiser built in the Ultima Segmentum will be very similar to a Lunar-class Cruiser built Segmentum Pacificus. This means crew is interchangeable, modules can be attached and changed without ship specific expertise and a ship can easily operate and get repairs in any part of the galaxy.