Per the inside account of Apple’s issues, Robby Walker, a senior director in Apple’s Siri division, held an all-hands meeting for the team and acknowledged that things were…not great. He acknowledged that team members might feel angry,

However, our hopes were greatly diminished with iOS 18.4 arriving as developer and public betas without a new Siri. This is especially true after so many reports and rumors hinted that Apple was planning to release the new Siri – at least the first taste of it – in the spring.

After facing delays and suggestions that an improved Siri would arrive with iOS 18.5 later this spring, it appears we may not see Siri 2.0 until later this year, possibly not until 2026. The tech blog Daring Fireball received a statement from Apple today implying that we wouldn't see the next Siri until the release of iOS 19.