Oh yeah, replication is critical. If it had been real this would have changed everything, even more than reported. Higher temperature superconducters can carry more current and withstand stronger fields than lower temperature ones, so a RTSC might be able to replace Li-ion batteries as well. They probably should have done a more rigorous test if they thought they really had something; most of these USOs don't get replicated because nobody has the funding to spend time on them, they basically got lucky it went viral.

This is not validation for all the negative-nellies who were instantly dumping all over the possibility that LK-99 could have been superconductive before these further tests were done.

I'm in this picture. Like I said, it's far from the first time. It's pretty much the same as a guy claiming he saw bigfoot, you can't prove him wrong until you search the same patch of forest, but it's a lot of effort to do that after 1000 unsuccessful searches and I think it's entirely valid to just go "yeah right, give me more evidence before I bother".