I don't think it's a concern. For as long as copyright law remains all-rights-reserved the free and open movement will need licenses. We should expect that most questions on this site will in some way touch on licensing. But that doesn't mean there can't be (or that there isn't already) a wide variety of questions just within the broad category of licensing itself (and of course other questions remain on topic too):
- questions about terminology and license explanations
- questions are applying licenses to projects, and relicensing projects
- questions about the compatibility of licenses and how libraries can be legally incorporated
- questions about contributor license agreements
- questions about implied licensing such as Github's forking functionality