FaceID is not going anywhere.
The question is; will they introduce in screen TouchID to complement it.
Doubtful. It’s redundant and unnecessary to have two forms of biometric screening on a mobile device. They already have said time and again Face ID is more secure. Additionally in this era of $1k flagships, I’m guessing they are looking at ways to cut costs and increase margins given the pricing complaints. That’s my guess why 3D Touch is on the way out. Easy cost cutter with (debatably) the same function via haptic touch. I for one have no problems with Face ID and don’t think we need to go back in time. Also looking forward to iOS 13, as they claimed fasted Face ID unlock by up to 30%.