Agree, but old industrial software that saw no development and updates in 20 years is too small of a sample from which to generate the conclusion that all softw

Agree, but old industrial software that saw no development and updates in 20 years is too small of a sample from which to generate the conclusion that all software generates value forever. Yes, in the case of industrial machinery it does, but that's mostly due to the hardware itself not becoming obsolete, not the software running on the machine. Often times, machine operators would love to have the software updated and modernized, as he hardware on which it runs is good for decades without any improvements. Therefore I disagree with this conclusion. I think software is the thing which gets obsoleted and rots the fastest, not the hardware. Which is why SW development is in so high demand and wages so high in contrast to HW and mechanical engineering.