And the database remained as a single point of failure.

This means that the network is another potential point of failure.

Then again, it makes Google's security procedures a single point of failure.

The fourth point of possible failure was simple and brutal.

A single point of failure can thus bring down the whole system.

It's a bad system with (as said above) a single point of failure.

Is there something bad about it aside from the potential for the single point of failure?

So it's not really a single point of failure, as far as i can tell.

But these are just small steps; fundamentally, the single points of failure still exist.

This is also known as a single point of failure.