I believe it's a chicken and egg problem. I know I would rely on video way more if my first sentence in every video call didn't have to be "can you hear me?"
I am pretty sure that I can do a high quality FaceTime call with a number of people.
Yet still I prefer doing a regular phone call. As so does just about everyone else. The question you should ask is: Why is that?
It is not a technical problem.
A number of people that could afford $1000+ to be able to use that platform.
I personally wouldn't consider this problem to be technically-solved until an Android that can barely be considered as a mid-ranger can do it.
For the most part, given the margins at the high end, it's not significantly better.