Reading the arxiv preprint, they fed H2S into a DAC using a capillary. The size of the sample under pressure was 1um thick and 10 um in diameter, which is inde

Reading the arxiv preprint, they fed H2S into a DAC using a capillary. The size of the sample under pressure was 1um thick and 10 um in diameter, which is indeed tiny. So, that's probably not so bad. Anyone who thinks this would make a great room temperature superconductor in real applications had better smarten up though.