In a significant shift from previous sentiment, CNBC host Jim Cramer has declared that his past doubts regarding AI infrastructure providers IREN Ltd. (NASDAQ:IREN) and Nebius Group NV (NASDAQ:NBIS) are now irrelevant, citing the “demand” in the booming artificial intelligence sector.Check out IREN and NBIS stock prices. Cramer Pivots On IREN, NebiusHis recent post on X suggests an overwhelming market need that eclipses earlier comparisons, including his prior favor for CoreWeave Inc. (NASDAQ:CRWV).Cramer’s ...