Letting go of Newtonian mechanics
Conscientious physics teachers fear that without a thorough understanding of motion and forces, students will not be able to grasp subsequent topics in physics. This turns out to not be the case. Very little of the sky falls if you move on from mechanics before it’s fully fermented.
I disagree, but Newtonian mechanics is so poorly taught that, as a result, it’s importance as a foundation for the rest of physics is poorly understood.