Something missing from those discussions is perception of legal risk around the licenses.
If you fail to comply with any FOSS license, the enforcement mechanism is the same: since you didn't uphold the terms of the license, you have NO license and thus can be penalized for copyright infringement.
However, FOSS license violations rarely result in the most draconian copyright infringement penalties. Generally, what FOSS authors want is adherence to the license going forward, rather than to sue you for money and maximize damages.
In the case of permissive licenses, coming into compliance just means adding credit somewhere. Nobody finds that painful. So infringement suits basically don't happen — infringeers just add credits in new releases, the past is forgotten, end of story.
In the case of copyleft, coming into compliance typically requires more work: most infringers remove the copyleft dependency and either replace it with something else or write new code. Theoretically the infringer could also release previously proprietary source code under the copyleft license but AFAIK in practice nobody chooses this option. Because copyleft compliance is more work, copyleft enforcement is a bigger deal, and copyleft authors sometimes go to court.
The consequence is that copyleft licenses are perceived as entailing greater legal risk, especially GPL and AGPL.
This copyleft-vs.-permissive bifurcation isn't perfect because e.g. the Eclipse License is a copyleft license but is perceived as low risk. Really the perception of risk around a licnse has to do with the community around the license and its traditions. GPL and AGPL, among all FOSS licenses, are perhaps the most likely to result in enforcement actions.
So... by choosing AGPL, you associate your project with a comparatively litigious FOSS community, even if the enforcement mechanism being leveraged isn't any different from what's available to permissive license communities. And so, users who wish to minimize what they perceive as increased legal risk may stay away from your project.
