https://www.nextplatform.com/2022/08/17/nvidia-shows-what-optically-linked-gpu-systems-might-look-like/

So we are getting close to solutions in this field, but as we know and the article says: Lots of big money have already made their bet, and they bet on Ayar Labs. Even though our solution might be better they wont drop their investment just right away again. And herein I see the problem and as Suresh mentioned earlier Adoption of new technology especially from a startup takes way longer as we all anticipated. 

Nevertheless nice move from suresh and he actually listens to his longies, as he has proven before.