In terms of the one part that every other company you've mentioned didn't cared about, which is gaming, they've contributed a ton. It's a good example of how Linux wouldn't ever go anywhere as a software kibbutz and that without corporate interest it's a toy.
When Valve wasn't interested in Linux, gaming on Linux was trash, and it was the one argument against Linux. When Valve got interested in Linux, they invested a lot of time and money into making it possible, and now it's becoming a viable option for gaming. But without Valve, it would still be garbage.
Linux is only good when there is a corporate incentive to make it good. When that's not there, it's a half-assed barely working shitheap of an OS. Just look at the recent KDE debacle where a theme could wipe your OS because it had root privileges. This is what happens with projects from software kibbutz's.
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This image will forever remain accurate. You want your OS to actually take over Windows? Stop treating it like a kibbutz, treat it like a corporate project. I'd love for it to be a viable alternative, but as long as it's treated like a communist utopia it's never going to happen.
