I first saw this on reddit, but I figured it would be good to make sure that this also stays accessible on another platform
I'm sympathetic to your idea of calling it OSS or Open Software. But Richard Stallman and people who agree with his arguments really stress the "freedom" of what they call free software. They lost that battle ages ago, but they aren't going to give it up since it's more than just pedantry, it's a value statement.