When I first purchased land in my area, it was pretty cheap and sellers were not likely to pay for a surveyor when they could rely on an old deed that might date back to the early 1800s. Some of these were as general as "on the waters of the Kentucky River and bounded on the north by Jones, east by Smith, south by Thomas and on the west by Greene, supposed to contain 85 acres, more or less".
A century or more might go by with no dispute at all. This has transitioned to modern surveys over the years but my homeplace deed still talks of the neighbors who lived in the area before the Civil War and uses as corners, trees that have been long gone for well over a hundred years.
Our local PVA offers aerial photos with red lines drawn to show property lines and who owns the property with its acreage.
Still, it might be interesting to digitalize the situation. If it came to court, some long standing arrangements might be hard to defend.