All the current commercial operating systems today are basically interchangeable, not counting a handful of design decisions (e.g. Finder vs. Explorer) or hardw

All the current commercial operating systems today are basically interchangeable, not counting a handful of design decisions (e.g. Finder vs. Explorer) or hardware compatibility. They're all basically the same thing. Heck Android and iOS are basically the same thing. Would a new commercially viable OS be able to offer anything that current ones don't? If not, it's not really commercially viable.