Why is software different from any other tool? Hammer manufacturers don't expect me to subscribe to their hammer service. Yet they somehow stay in business. (T

Why is software different from any other tool? Hammer manufacturers don't expect me to subscribe to their hammer service. Yet they somehow stay in business. (To anticipate the "software lasts forever" argument: no, it doesn't, and it certainly doesn't last as long as a hammer. I doubt anything I'm running on my computer was built more than five years ago. There are SMBs running Windows 95 on a 386, but if they really bought something perfect for their needs 25 years ago, great!)