@mimiflam You make an excellent point. Yoga is a form of myofascial release, and releasing the tight stuck fascia lets the body move again and clear the waste products out that have been stored there. When you move your spine, you could be relieving pressure that can build when muscle spasms have taken over in the neck or back. All that pressure on the bones in the spine can cause problems if it is uneven pressure. Uneven pressure on the end plates of the vertebra causes bone growth like bone spurs to form and the bone remodels. If there is also a disc that is weakened and collapsing, it just adds to that problem. Our bodies were meant to move.

One thing I can say about stretching is that if you have a disc that is very weakened (as I did), it doesn't take much to rupture it. All I had to do was turn my head when I was stretching, and my C5/C6 ruptured and my head suddenly turned further. It didn't hurt, but it just felt weird and kind of queasy and there was a sound when it happened. It was going to happen anyway, but once that jelly like disc material escaped, the inflammation caused bone spurs to grow quickly, and I was on a path to surgery. It is important to know your spine condition and to know and listen to what your body says. Be gentle, and not aggressive about stretching to avoid injuries. Remodeling the fascia takes time while you hold a gentle stretch.

Here is our discussion about myofascial release therapy that may be of interest.

— Myofascial Release Therapy (MFR) for treating compression and pain:
https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/
Have you heard of Myofascial Release Therapy?