L. Ron Hubbard is fundamentally good!
I kid, but seriously, good how? Because it ensures cybersecurity engineers will always have a job?
seL4 is not the final answer, but something close to it absolutely will be. Capability-based security is an irreducible concept at a mathematical level, meaning you can’t do better than it, at best you can match it, and its certainly not matched by anything else we’ve discovered in this space.