Typing on one right now and cannot agree more. Great hardware ruined by Verizon exclusivity. Moto and Verizon teased the us with an upcoming lollipop update for a whole year before cancelling it and tried to make us pay more for the newer models with a discount, thank you but no.
Before that I owned every Droid qwerty slider including the elusive Droid 3. I love the form factor mainly because once extended the phone becomes a very natural reading/typing device not unlike some of the early PDAs. The keyboard was getting better with each iteration and Droid 4 was probably the best phone I have ever used for remote management with the row of dedicated numbers keys. We have all lost something when qwerty sliders faded out of the mainstream.