Apple is shaking up its executive ranks to get its AI efforts back on track after months of delays, Bloomberg News reported Thursday citing people familiar with the situation. Some AI improvements to voice assistant Siri will be delayed until 2026, Apple had said earlier this month without giving any reason for the delays. Mike Rockwell, vice president in charge of the Vision Products Group, will now be in charge of the iPhone maker’s Siri virtual assistant as CEO Tim Cook has lost confidence in AI head John Giannandrea’s ability to execute...