Well, there is Synthesis OS [1] where the kernel can rewrite itself on the fly to provide synthesized system calls (think of a specialized `read()` call that ca

Well, there is Synthesis OS [1] where the kernel can rewrite itself on the fly to provide synthesized system calls (think of a specialized `read()` call that can return a file line-by-line for just a simple example). But even that is (was?) almost 30 years ago. [1] http://valerieaurora.org/synthesis/SynthesisOS/ http://valerieaurora.org/synthesis/SynthesisOS/