@MattHodges I like to go with, not only have we done a billion experiments, but without these processes there would be no life on Earth. ;) When I was in college, I remember working out the fact that the sun wouldn’t shine absent quantum tunneling. So I made this video. https://youtu.be/6LKjJT7gh9s?si=7QV6UOxF2TuFqKJ4

Sure I could have pointed to the fact many electronics wouldn’t work without tunneling, but the Sun is much more dramatic.