Section planes are great in 2020 !
It is so simple to manage section planes now. You can leave section plane visibility to off at all times. (auto on at creation time). Just click on a cut and the Section Plane will appear, ready to be moved or deactivated.
And also selection in the Outliner panel is possible. Even when invisible.
So there is no need to have any Style show Section Planes. In fact they do not belong in the Styles parameter anymore, IMHO.
I would very much like Section planes visibility removed from the Style parameters. It would also avoid the confusion when creating scenes; you know the warning about the Style parameters having to be updated.
Thought about making it a FR, but I’d like your thoughts on this.