They didn't propose new class of superconductors. They conjectured that LK99 follows some 25-year-old theory from a paper written in Korean. Leaving alone the f

They didn't propose new class of superconductors. They conjectured that LK99 follows some 25-year-old theory from a paper written in Korean. Leaving alone the fact that the theory doesn't make much sense to me (at least the parts I managed to understand), there was no evidence in the LK-99 paper that this mechanism is indeed what makes LK99 superconductive (or more precisely that it is present in LK99).