One has to only look at the fact that college educated people went heavily for Biden. Cities and their suburbs are growing, with new types of modern jobs being created in them. Exburbs are growing also, but not as face as their suburban cousins that are closer in to cities, exburbs eventually get absorbed by suburbs. Rural areas and smaller towns have a high concentration of people that dont have a high level of education, todays economy is brutal for those people.
The question is what do we do about the situation? If you g people are pulled from rural areas and small towns to get advanced educations either in college or Trade Schools, they simply wont return to those rural areas and small towns to live unless they are incentivized to do do. Private business has no reason to incentivize people that have gotten trained, it is simpler to just employ those people in the cities and suburbs where companies have operations, since all the resources for young people are already in place in more populated areas and dont have to be created or rebuilt. The government can incentivize Doctors and Nurses from rural areas and small towns to return to those areas, but that entails permanent support to insure that hospitals and related resources get money to stay open.
Already we are seeing that the vast majority of Americans live in or near prosperous cities and suburbs. What I predict will likely happen is that the prosperous areas will contain even more people in two decades and rural areas will be populated, thinly, by people working for corporate farms or in extraction industries (mining, drilling, ect). The future is why republican politicians are working so hard to blunt the voting power of cities and their suburbs.