In this Club Check-in, CNBC's Paulina Likos and Zev Fima break down big tech's massive artificial intelligence spending spree — debating whether these billion-dollar bets will drive long-term cost savings or weigh on near-term returns.Mega-cap tech companies are shelling out billions of dollars to build out AI infrastructure. The big question we're asking is whether all this heavy spending will eventually pay off in efficiency or if Wall Street is right to worry about how much they're burning through in the ...