A workstation is more ergonomic than sitting hunched over a laptop. The screen is too low that way, which messes up your back/neck. Elevating the laptop makes it more difficult to use the laptop keyboard, but regardless, my mechanical keyboard is much more comfortable and efficient than the laptop one anyway. You can feel the tactility in this video.
I rarely use the numpad enough to justify having it, plus it lets me reduce the distance of my hands between the keyboard and the tablet (tablets really take up a lot of space).
AMAZING
It's the Rolls Royce of desk chairs. Definitely recommend you try one for a week.