We'll see how that works in a world where someone/something with enough cash/tokens can say "hey there little AI buddy...why don't you code me up something that works exactly like Linux without all those pesky licensing things while I grab a beer". Personally, I think that's going to be kinda inevitable in the corporate world since I could say thing like "...oh, and add these 5 things Linux doesn't do, and don't reimpliment anything that isn't in this widget we want to sell. And write it in rust, because I heard that's cool." and instantly get a slimmed down, bespoke chunk of software that I/the corp/evil people can (so far?) claim ownership of.
GP is saying (paraphrased) "I'm not worried about Linux because even if IBM (or Qualcomm, or ...) decides to close down their Linux efforts, the Linux devs will go someplace else and still contribute", which is true as far as it goes. My contention is it might not matter, because the big player can just as easily pay far fewer people to vibecode their own Linux workalike and take back control by displacing OG Linux in their tech ecosystem. When I can leverage all the previous work done to create Linux (aka The Hard Part), leave the licensing behind (not tested in court yet) and have my very own OS that I can vibecode/iterate any way I want independent of the Linux dev community, why would $BIGCOMPANY not consider doing that? How would it be it 'valueless' to one of these players (most of whom chafe at being in bed with the OSS community anyway)? On the contrary, what value would the Linux devs still have? Why would I even consider taking any contributions not from my own little AI playpen, since I'd be able to trivially say "hey AI...those crusty old Linux devs look like they got themselves a good idea...why don't you add that to our own private OS in the next spin. Think of a nifty marketing spin to advertise it and come up with some commercials to promote it. In the style of Micheal Bay this time".
...and have it fail spectacularly when deployed in an environment that requires reliability performance and high availability. Yes, I honestly can't wait to see those horror comedies unfold, but hopefully far away from me. :)
Should be an interesting decade coming up.