For server side, which I believe is the context here, Linux and open source are king.
Even Microsoft gave up on Windows and just runs Linux most things except niche cases. Heck, even SQL Server which is expensive piece of machinery got ported to Linux and that's the default target now in their docs.
With that said, one can't deny Apple's success on the b2c side of things so it feels wrong to call their strategy a failure.
Except the cloud isn't open source, the ones that matter to developers that is.
Which is why so many projects get burned with their license choices.
I don't see how this comment is relevant to parent's point. Sure, cloud is proprietary. But it is Linux for the vast majority.
Which is an Pyrrhic victory, when Linus and other founders are long gone, most of this generation actually, what will subsist are proprietary forks, just like what happened with UNIX System V.