IMO a sane syscall API that was built with sandboxing in mind. The unix API gives you access to basically all of the computer or at least all of the user's data

IMO a sane syscall API that was built with sandboxing in mind. The unix API gives you access to basically all of the computer or at least all of the user's data. Nowadays we live with executables we can't trust. Random binaries don't need to be dangerous to execute, only the syscalls that they can make on windows and unixes make them dangerous. This also relieves you from the need to sign most programs by a central authority