Why did camera manufacturers adopt a closed proprietary Microsoft file system?

You have things a little confused here. Ask yourself why all the digital camera makers use their own proprietary file structure. Every friggin digital cam mfg uses a different file type for their images and videos. They arent even compatible with each other! How do you expect them to be compatible with anything else? Their software has to convert their file formats to something a computer understands. Now you talk fan boy, the bottom line is since 95 percent of the users out their are buying Pcs, what do you think the mfgs are going to design their software around? If you bought a Mac, you have simply compounded the problem. Now you need to ask yourself why Apple has to have been a proprietary system for over 25 years. The math alone speaks for itself. If you are a Mac fan boy, look at the truth here. Why does Apple have to be so incompatible with the rest of the world?