I know of quite a few products that have not been updated since the late 90's, early 2000's and bring in quite a nice chunk of change. The common characteristi

I know of quite a few products that have not been updated since the late 90's, early 2000's and bring in quite a nice chunk of change. The common characteristics: * The customers are not whiners: Does it work? Yes? Sold * Non-trivial problem: Inventory, computer graphics, math * Pricing: Expensive So, ok, some company making a subversion interface stopped updating their software. Someone else picks it up because it's /easy/. That's why you don't make software for software developers! Sell them chairs or something. These guys keep making money because the problems they solve are hard.