This is not so relevant for modern agriculture, but my family still has the Valmet 361D tractor my father bought in 1963. It runs as good as ever. The diesel en

This is not so relevant for modern agriculture, but my family still has the Valmet 361D tractor my father bought in 1963. It runs as good as ever. The diesel engine needed to have the cylinder tubes replaced some 30 years ago, and other mechanical parts do wear out and are replaced, but this thing isn't going to be out of use because of software issues. It's too small to be very useful in modern farming, though.