If that is so, factories should maybe not buy software that has a much shorter lifespan than their 20 years. In essence, they are the ones making the mistake, n

If that is so, factories should maybe not buy software that has a much shorter lifespan than their 20 years. In essence, they are the ones making the mistake, not the OS vendor. Heck, they should probably fork an existing OS and maintain it themselves if this lifetime requirement is such an important thing.