Crowded? No. Littered? Perhaps, depending on the altitude. The article you linked says the bulk of the existing debris is from a few isolated incidents. These

Crowded? No. Littered? Perhaps, depending on the altitude. The article you linked says the bulk of the existing debris is from a few isolated incidents. These satellites are generally low enough tha their orbits decay after a couple years if they don't boost themselves, and then they burn up in the atmosphere.