I personally still miss my old Motorola Milestone I used to have. The keyboard was so easy and fun to use, and the phone itself was so well built. No phone I've used ever since can compare to it (iPhones, nexus, samsungs, Motorolas and a few other).
Personally I'll never be as accurate typing on a touchscreen with SwiftKey or whatever than I was with the Milestone's physical keyboard. I've spent quite a lot of time testing the few sliders out there every time I'm looking for a new phone, but as the poster said that functionality has been abandoned for some reason, and the only alternatives out there are really crappy low end devices.