The problem, which is often the case with Thunderf00t, is that he is missing the forest for the trees. No one who knows anything was thinking of using LK-99 for serious applications. The specs of LK-99 where just too shit. What it would have been is a start shot for understanding the effect and creating more useful materials based on the same underlying physical process.
Thunderf00t's point, though, is that LK-99 is not novel in its material category. High temperature superconductors that are hard and brittle already existed. What would be interesting would be a malleable high temperature semiconductor, because then you can make it into cables.
There is nothing remotely close to the category of "stp superconductor". This is quite obvious when looking at a plot of critical limits of known superconductors.
a superconductor at 100+ degrees celsius and ambient pressures doesn't exist as of now. anything even approaching that would be earth shattering. Even if they are ceramic.