What I know about quantum computers you could write on a stamp. What you know about them you could write on the tip of a toothpick in size 50font.
The reason the majority of research and dev is done on this in the private sector is because it is so expensive. Of course governments are involved but they cannot budget or raise the capitol to see it through. Then you have the problem of cooling, H3 is the preferred but that is very rare on Earth, so now you have a new space race… but you already knew that. I’d hazard you think AI is nearing Skynet capabilities