P.S. Not really necessary but in writing this comment, I read these documents, each of which taught me something new:
https://interestingengineering.com/science/a-brief-history-o... https://spie.org/publications/tt82_25_speed_of_light https://en.wikipedia.org/wiki/Luminiferous_aether
Wish what had been defined? the second?
I would assume they meant meter since they wrote that.
> The meter (m) is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299,792,458 when expressed in the unit m s−1, where the second is defined in terms of ∆νCs.[0]
Your proposed change is keeping this the exact same but changing 299,792,458 to 300,000,000?
You said: “I wish it had been defined in relation to the speed of light in a vacuum.”
I believe it is already, as written above.
0: https://www.nist.gov/pml/owm/si-units-length#:~:text=The%20m....