To really be usable - by revenue-generating trains - track has to receive regular maintenance. Which costs money. If your RR is desperately short on both revenue-generating trains and money, then it's kinda obvious that you cut the no-longer-necessary expenses.
And railroad rails are steel, generally weighing 100+ pounds per yard. Scrap steel sold for far fewer dollars per ton in the '70's - but you get about 200 tons per mile of unused track that you tear up.
To really be usable - by revenue-generating trains - track has to receive regular maintenance. Which costs money. If your RR is desperately short on both revenue-generating trains and money, then it's kinda obvious that you cut the no-longer-necessary expenses.
And railroad rails are steel, generally weighing 100+ pounds per yard. Scrap steel sold for far fewer dollars per ton in the '70's - but you get about 200 tons per mile of unused track that you tear up.