Depends on the equipment. Either it is physically dismantled by then, or people find ways to keep it running. No joke, I worked at sites than ran production equipment from the interwar period and, in one case, the early 1900s. If it is profitable, and you are allowed to run it fornenvironmental reasons, it will run forna long, long time indeed regardless of tech (controlers, chips, software) used in running.

By the way, those pre-pre-war stuff ran in the southern part of Germany. So funds and avaiaibility for newequipment was not a big issue in the literal century+ since it was built.