There is no opposition here. You can, unless I'm missing something, run a unikernel within a SGX enclave. They are complementary. Since a unikernel provides a

There is no opposition here. You can, unless I'm missing something, run a unikernel within a SGX enclave. They are complementary. Since a unikernel provides a self-contained system it could provide very clear and reasonably secure interfaces to the enclave.