To be exact, these are codenames for PureOS releases.
PureOS 9 was called Amber, and it was the first release to use the current naming scheme. Incidentally, it was also the first release that the Librem 5 shipped with. The next release after Crimson, PureOS 12, is called Dawn (and is based on Debian 13 Trixie).
Every tiny bit of energy consumption … 3 minutes here, 5 minutes there … and at some point we have a whole hour more each day. 
I also think in direction of software optimization itself, not just about firmware and drivers.
Extreme optimization: pure terminal operated phone to cut back on GUI overhead? Or maybe voice. After all, it’s the screen and graphical elements that are a major source of energy consumption… 
Debian Trixie is to be released soon:
I thought about creating a Linux distribution based on that idea, but that does not necessarily overcome the display’s power consumption itself.
Terminal apps can use more energy than a GUI apps on the same task, when people do not so optimized operation stuff in terminal apps. 
And I think we can agree that GUI itself is no overhead - otherwise people would install Xfce, if they think so. For everyone else it’s no overhead. 
Well, if we’re not getting an e-ink display, maybe one option would be to learn to use the touch display from memory - turning the backlight all the way down 
That’s tweaking the user instead of software/hardware. And btw, I’m indeed using the display as dark as possible (especially outside at night or indoor).
Or the background light auto adjustment will work proper at some point. So this could be such an software update I was speaking about.
What do you think about Sxmo?
Way too fancy for the joke. But I’ve seen scripts that have mode advanced GUI features than phosh (like how to select things from screen should be copied to it)
Was thinking about it, but all the “put-random-letters-together” names are hard to remember. 