Larry Ellison borrowed billions in an effort to turn Oracle into one of the companies providing the infrastructure for the A.I. boom. Now, concerns are mounting about whether the massive investments in A.I. will ever pay off.

nyti.msLarry Ellison Bet It All on the A.I. Boom. Will He Be the Face of the A.I. Bubble?Inside the 81-year-old billionaire’s risky, debt-fueled scramble to transform his data empire into an A.I. juggernaut.