Controlling settings, permissions, and membership within Teams and channels
This is a major issue. We have clients that have exhaustive training and strict processes around new Teams creation. The "General" channel has always been a default, and thus vast documentation exists to accommodate for that. And, the clients use the General channel. So, not only do they need it, but asking them to use the Admin center (most users don't have access to this) or mobile teams (many users do not use mobile teams) is not an acceptable workaround. Even it it was, it would still require significant change management to update all processes and documentation, and train relevant staff.