As I’ve said a few times already: this cycle has been impacted by the EU deadline. Apple raced 17.4 out the door to meet the March 6th deadline. As we’ve seen in past years, the X.4 iteration was released several weeks later in the year. Apple still has to “land” at WWDC, so it would not surprise me that the balance of the beta releases line up with past years to get them there. So that would mean 17.5 b 1 could be released as late as March 27th/28th to line up with last year (3/28) or later (e.g., 15.5 b1 was released on 4/5/22).