Last night I went to the Apple Store to get a new battery for my iPhone 12 mini. Normally that process would take about an hour. Because I had the iOS 17 beta installed, however, they had to wipe my phone and downgrade it to iOS 16-something before they would swap the battery. The process took so long that I had to leave my phone with them overnight to get the repair, and will be getting it today at lunchtime.