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.