Diagnosed: cervical dystonia, 2019. recent mri- c5/c6 w/ mild left hemicord flattening, left central disc protrusion w/ osteophytes w/ moderate left spinal canal stenosis. spinal canal- 7.5 mm. 3yrs of progressive neck pain. q: how severe is this?

Any degree of "spinal canal stenosis" can compromise and affect neural transmission, causing resultant pain in neck and shoulder movement. "Osteophytes and left central disc protrusion" can be progressive, with additional effects on freedom of movement without accompanying pain. Referral to a university department of orthopedics or neurosurgery is appropriate for guidance.

Your questions have been previously addressed, and responses will be unchanged. Will repeat the need for surgical evaluation, as your structural issues will not spontaneously resolve, and risk of spinal cord damage needs evaluation.