It took centuries to come up with the smallpox vaccine. None of the control methods have available genetically-engineered trees. They can only substantially decrease rate of infection, but that's nowhere close to 90%.
I saw the original LAMF post. A detail missing here was that the inspectors were joking (that it could be dangerous) at first when they saw the cut because even they didn’t know how dangerous it was.
Well, one still could do it like how many countries transitioned to the metric system: slap the traditional names onto things that are actually now defined by the metric system, like how China's catty, about 0.60478... kg, became 0.5kg. Just slap "Letter" onto A4.