I should clarify that my ire is not directed at the scientists involved here, but at the media who cite overarching ‘reliability’ because of one small aspect of the factors affecting geochronometry. The significance of these results merely shows that radisotope decay is not some sort of fundamental, unalterable constant - but the scientific community has known that for years outside of the propaganda channels.
Let's see how much that constant would have to change for a young Earth.
90 percent change - Earth is 450 million years old.
99 percent change - Earth is 45 million years old.
99.99 percent - Earth is 4.5 million years old.
99.999 percent - Earth is 450,000 years old.
99.9999 percent - Earth is 45,000 years old.
So in other words, the rate of fluctuation in radiometric decay would have to be greater than 99.9999 percent to get to a 6,000 year old Earth.