Inability to walk properly without support in case of cervical spondylitis indicates need for mri..kindly do MRI( cervical spine with screening of whole spine) This will clearly tell us the level and amount of compression on the cord and nerves.
Further treatment depends on that.
Gait Problems at this age are usually concerned with damage to brain tissue / loss of muscle strength. the Possibility has to be ruled out first before commenting anything. As far as CS goes. yes certainly it can have devastating effects on walk , but that is only when Spinal Nerves get compressed.
PLease Get a thorough assessment done about the Gait Issue Because the treatment plan will differ for Cognitive issues and will be different for Musculoskeletal Issues.
Get an Assessment Done From Neurologist as early as possible. Stay Healthy