Compuser10165 :
I know that, I just it is possible for a new standard to emerge (maybe on a different technology) that can solve all the problems with adaptive sync that neither AMD or Nvidia certify (maybe another company), or certified by both with no extra cost from the manufacturers.
Adaptive Sync does not need to be certified by either AMD or Nvidia, it is a VESA standard and display manufacturers can certify that themselves. As long as the display manufacturers follow the VESA DP1.2a spec, it makes no difference who the GPU manufacturer is, what the details of their AdaptiveSync implementation on the GPU/driver side are or what brand they are marketing it under. All the display and GPU outputs care about is that the GPU and display are following the DP1.2a/1.3 AdaptiveSync spec and as long as they do that, any AdaptiveSync display can be used with any AdaptiveSync GPU regardless of marketing brands.
AMD's additional FreeSync "certification" is entirely for marketing purposes. The simple fact that you thought AMD is involved in AdaptiveSync certification says you got caught up in the confusion as well.
If Nvidia decided to adopt AdaptiveSync, they could very well choose to market their GPU/driver implementation under the "G-Sync 2.0" brand and those hypothetical G-Sync 2.0 GPUs and Nvidia-approved displays would still work with FreeSync GPUs/displays or generic AdaptiveSync displays that carry neither marketing brands.