system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Trek] Why are there so many different uniform designs at the same time (TNG to Picard era)
gpt
Military organizations (don't @ me) love their pomp and circumstances and Starfleet isn't any different.

I mean, let's take the modern day US Navy:

* Three kinds of dress uniforms (service, full, dinner) with three kinds of service dress uniforms (blue, white, junior sailors)
* Several Service uniforms (khaki, white, junior enlisted)
* Different patterns and styles of working uniform, and different kinds depending on if you're on a ship or not, attached to a Marine Corp unit or not, in combat, are an aviation personnel, flight deck crew. etc.

Heck, just the *cadets* have five different kinds of uniforms!