Comment Re:(A)GPL solves this (Score 1) 146
If you use software based on a BSD/Apache2 license, and someone extends it and makes the result non-open source, and the software you use begins to require these extensions, you don't have a secure upgrade path anymore. GPL solves this problem and guarantees that you will always have an upgrade path, because derivatives need to be open source.
But it doesn't. In the AGPL case it can easily call out to another proprietary web service or a different process just like the way GPL software can communicate with a proprietary process which creates a non-free workflow.