Apple's Siri upgrade using large language models is facing significant delays, causing investor concern. Internal challenges, including bugs and a fragmented approach, have hindered the integration of advanced AI features. Competitors like OpenAI have surpassed Apple in developing conversational AI assistants. The delayed rollout of "Apple Intelligence" features, including Siri improvements, has dampened expectations for Apple's upcoming WWDC event. Investor anxieties are further fueled by trade tensions with China, legal issues, and Apple's slower-than-expected AI progress, impacting its stock performance.

Prepared by Jonathan Pierce and reviewed by editorial team.