Hunter gatherers take advantage of temporary bounties of nature. A base in more stable locations becomes desirable at some point, at which farming communities develop. As technology advances to the point where farmers can expand into slightly less stable environments, they will do so.
We are now seeing the next encroachment, that of cities and suburbs into farming communities. We could ask a similar question, is city expansion being slowed down by the farming community? In some manner, yes, due to political pressure and some tax laws to restrict “sprawl”.
There is a limit to how large a city can grow, since its survival is entirely dependent on the existence of farms for food.