The problem with Tingling sensations are that it can occur for any number of reasons, in the order of occurrence - Anxiety, Spinal issues, Issues with the nerves in the hand; unfortunately I had reasons to believe, I had all of them.
Apart from treating spinal stenosis, the tingling sensations were not treated specifically as the none of the tests isolated the reason for it. But, after spine surgery tingling sensations haven't occurred much which seems to suggest whether spinal stenosis was the reason for it.
I will link[1] the article you read just for the context of others. I haven't updated it, since then my neck movements have improved.
As you say, I'm facing severe hand numbness & pain after surgeries. Medical tests didn't help with it.
I have isolated the issue to pressure on the nerves in hands while sleeping on that side. I bought wrist splint to avoid flexing my wrists while sleeping & have generally avoided sleeping on that side; it seems to have helped. This physio therapy video[1] talks about the techniques I follow. I hope it helps you too.
I'm glad that you didn't have to close your company, you took correct steps to prevent it. I helped my developers get good offers from other companies and I have closed my company.
[1]: https://abishekmuthian.com/i-was-told-i-would-become-quadrip...
[2]:https://www.youtube.com/watch?v=rRCnRYOupCo