Combined with a large curved 4K screen and a split keyboard at each arm with a trackball/touchpad for cursor/gestures.
It's fun to think which seatbelts would be more appropriate for a programmers chair, but, in this case, I'd think they'd be a hard requirement.
I have a day chair, a chair for home, and a couch at home.
I'm a big fan of flipping between multiple chairs and taking breaks.
Very good question, I've been foam rolling my back per my Dr. of physical therapy which helps a ton with back pain.
Personal preference, activity level, desk type, and (dis)ability status would all be important factors, as well.