> But I don't think there's any unemployment danger among CS PhD's to worry about

This is why my comment specifically addressed top positions and tenured positions i.e., a position with a specific world-renown research group. Competition for the positions that putting all that time and effort into a PhD would be for.

> employed in a research or at least R&D capacity.

Sure, jobs exist. I am not seeing where I denied this fact anywhere.

> tenured positions do not pay eye-watering salaries

Tenure is what I am specifically referring too. It's a form of intellectual and economic freedom.