The center channel is not as common in music use cases as it is in the audio-visual content world. However, it can be a useful addition in your mix. Considerations should be made around:
- Overly exposed lead vocals - Artists may not want their voice to be able to be solo'd easily from other sources
- Over reliance on the physical speaker - In certain configurations, like a common stereo system, there is no physical center speaker, so it is a good idea to check how your mix will sound with only left and right speakers.