GPS, satellite failures, and space junk

Now that we have lost LORAN and are scheduled to lose most other
ground based navigation aids, I wonder what the thoughts are now that
the unthinkable happened this past week.

Two large communications? satellites collided at very high speed
creating a debris cloud about 200 X 300 miles and spreading. This
increases the chances of other Low Earth Orbit (LEO) collisions by at
least an order of magnitude. Technically there should be two debris
clouds diverging and spreading out like a shotgun blast even if the
collision had been at a shallow angle, which it wasn't.

As one astronaut said, the greatest danger in the flight going back to
the moon or mars is getting through the cloud of junk surrounding the
earth (paraphrased).

I wonder what this has done to the risk for our GPS constellation?

Roger (K8RI)