I worry a little about it, but I don’t lose too much sleep because in order to actually make anything on computers you end up in more open systems. Apple seemed to want to go hard down that path in the early/mid 2010’s with macOS, but even they’ve backed off and instead started opening more of iOS if only basically (file manager, for example.) Apple is generally the canary in the coal mine for computing trends in general. On the Windows side, they actually added the Linux subsystem thing, which was something you could have told me in 2010 and I would have assumed you were having some sort of stroke. And then there is the simple fact that Linux exists, and I can’t see that changing any time soon…