system
Given the following post, respond as if you're commenting on Reddit:
human
Does Large Hadron Collider need re-calibration after redefinition of SI units?

How are measurements in different detectors over at LHC connected to the current values of speed of light, kilogram, etc? Would redefinition of SI units need updates in other kinds of measuring devices in science laboratories across the world?
gpt
No.  The new unit is defined to be mathematically identical to the old one, and all measurement devices on the planet are still as correct today as they were last week.

We've just gone from having a very accurate experiment whose results depend on the size of the kilogram to having the kilogram depend on the results of that very accurate experiment.  Since that experiment is more reliable and repeatable than putting the old platinum cylinder kilogram on a scale, it's an improvement for the future, but it doesn't make any practical difference today.