There&#x27;s nothing stopping anyone from forking the Linux kernel and adding their own advanced features if they think they&#x27;re so valuable.  Almost no one even uses a vanilla Linus kernel; distros all have their own custom kernels. So the fact that no one&#x27;s bothered making a big competitor to Linus&#x27;s kernel (which of course would mostly be a drop-in replacement) means that either no one thinks these things are useful, or no one&#x27;s really competent enough to do it (and willing to spend the time&#x2F;effort).  As for filesystem advancements, they&#x27;re working on btrfs; what more do you want?