Question

I heard that there are religious courts nowadays that adjudicate the law of the adjacent neighbor in apartment buildings.
That seems a bit illogical: by the time a person finds an apartment he likes, the neighbor comes and takes it so that he can have a larger apartment? Maybe specifically with fields, the gap between two distant fields and one large field is much more significant.
In any case, it all seems a bit anachronistic to me [especially since here the Sages explicitly say that the law stems from the need to do what is right and good, and nowadays it doesn’t seem to me that there is any point to it.]
What does the Rabbi say?