Your mileage may vary
My hand had gone numb at night for the past 15-20 years, worse when we needed a new mattress, new pillow, etc - so I always really struggle when we go on vacation. The push to finally do something after 15 years was because the intermittent left arm nerve pain had become constant right arm nerve pain, then radiated down to my hands. MRI (previous MRI was 2003, and I still had the films, so they were able to compare results, even though my DR had long ago retired) was Jan 2017, pain had gone from livable to I'd better get back to the DR in Oct 2016. Results came back with "severe spinal stenosis" due to the bulging/herniated (why can't they make up their mind with the name) according to the radiologist (or whoever reads MRI results) but my DR said it wasn't that bad or I would have to go for surgery immediately. I didn't want cervical spine surgery, so PT, new meds, nerve conduction test, and cortisone shot - by April I could barely drive, write, cook, etc bc the pain was so bad. Surgery was the last day of the school year bc I wanted to finish out the year... surgeon (not the same dr who had given me the results of the MRI) said when he got in there, it was a lot more severe than they expected - original results were probably correct and I probably should have gotten it done in January.
I had anterior disc replacement instead of a full fusion. One night in the hospital, 6 weeks of no driving, wore a neck brace for about 3 months. Almost 8 months out now and really feeling SO much better. No meds at all.