It showed improvements are possible but only up to a point. The more radical measures become, the costlier they are and the less likely they will be implemented because of the politics.
I want to know more about this because I find it interesting and slightly confusing of how improvements are being made but being cut off at a certain point. I think this relates to the fact that we are living in the most modern version of ourselves and that in the future, there will be more but we just need to wait. However, I find the part about implementing the improvements because of the politics fascinating and confusing.