Buttons will not make a full return for two reasons - cost and the most relevant automotive markets. The cost reason will remove most of them for good, even if some more buttons will now return for one intermediate generation before disappearing for good. Both the development and production cost of physical buttons is higher and no OEM wants this.
As for the customers, in the key markets customers are so thoroughly used to touch screens in all walks of life that they don’t want or need buttons.
Many here still appreciate the tactile feedback and the ability to control things ‘blind’ while driving. Sadly the majority of traffic nowadays doesn’t happen on unrestricted highways or fun mountain passes but with a distance adjusted cruise control at just above walking speeds, where there’s all the time in the world to operate the touchscreen 🤷🏻♂️