> Anyone can take an existing Apache 2.0 project and change the license to AGPL 3.0.
No, you cannot. The very page you've linked to makes this clear:
> Apache 2 software can therefore be included in GPLv3 projects, because the GPLv3 license accepts our software into GPLv3 works
This is precisely what I've written. You can also apply the AGPLv3, you cannot remove the Apache 2.0. The contributions made under Apache 2.0, are still under Apache 2.0. The Apache 2.0 allows sub-licensing, so any contributor who uses those contributions from now is accepting them under the AGPLv3 and Apache 2.0. The former does not supplant the latter.
No, you cannot. The very page you've linked to makes this clear:
> Apache 2 software can therefore be included in GPLv3 projects, because the GPLv3 license accepts our software into GPLv3 works
This is precisely what I've written. You can also apply the AGPLv3, you cannot remove the Apache 2.0. The contributions made under Apache 2.0, are still under Apache 2.0. The Apache 2.0 allows sub-licensing, so any contributor who uses those contributions from now is accepting them under the AGPLv3 and Apache 2.0. The former does not supplant the latter.