alt Hacker NewsThe question I always have when I see these userspace kernels is, Linux in Userspace exists. You can boot Linux with a root in userspace already. Why write a new kernel from scratch instead of fixing/improving usermode Linux instead, which has the benefit of providing the entire Linux API already?
Option A) Everyone shares one OS (container, sandbox, kernel, firewall, whatever). It gets a lot of eyes on it to find bugs. Hacker fuzzes it with a lot of tokens offline. He finds one exploitable vulnerability and he owns everyone.
Option Z) Everyone vibe codes their own custom OS. Each implements and exposes only what they want. Hacker has to beat up on it online to find vulnerabilities. He finds one and he only owns that one machine.
There's probably some middle ground between A and Z, but monocultures are fragile. All eggs in one basket, potato famines, banana fungus, etc...