Interesting. We've just tossed our kg, so I thought that the new standard for kg had been accepted.
Well, maybe to do with trade between nations. But with that aim in mind, there is significant science in the definitions to make as many standards as possible based solely on fundamental constants that can be measured or defined; getting away from that rather arbitrary block of Pt and such.
The science doesn't care a whit whether g = 9.8m/s^2 or 32.2ft/s^2, the foot can be defined in terms of the wavelength of krypton emitted light just as easily as the meter can, absolute zero is 0.0 degrees in both Kelvin and Rankin, and so on.
G = 3.19x10^13 cubits/fortnight^2 would work just as well, too.