I used to have lots of neck pain and back pain. Tried all sorts of things from standing desks to Aeron ergonomic chairs.
Now I strictly use a laptop, no more multi-monitor setup, no ergonomic keyboard, no standing desk, I have poor posture, and, I have no more back and neck pain.
Turns out that my anxiety was wiring my pain neurons together with certain pressures. Basically I was scared, and at some point the neurons that fired together wired together. It's a similar mechanism in the brain as somebody that has phantom limb pain.
What really helped me with this was the Boulder back pain study, which studied people using functional MRI machines and analyzing the pain region of people's brains. And using Pain Reprocessing Therapy and then analyzing with the functional MRI scans again. And many of the people who had a level 4 or higher pain for 5 years or more, got down to a zero or one. So I read that study, and I read the book on the study which is called The Way Out, and there's a film on the study as well called Pain Brain Film, and there's a podcast called Tell Me About Your Pain. I basically binge watched, listened and read all of this stuff and eventually unlearned my pain.
And now I have wonderful freedom with a laptop anywhere in the world! I can sit on a park bench or a s*** chair, or on a comfortable couch, I still have poor posture. I don't try to sit up straight anymore. And I don't have any chronic back pain or neck pain anymore.