On the other hand, containerization typically occurs on an independent (from other owners) instance of a virtual machine, which typically is running on separate processor cores, helping increase the overall isolation despite residing on shared hardware. Exposed processor caches due to exploits like Meltdown are a significantly higher risk on a platform of this kind than on a containerized environment. V8 exists at a much higher level than hardware-level exploits. How does your platform mitigate these kinds of concerns? Presumably you have some kind of virtualization above this to manage roll out of your execution environment, but adding a shared execution context like V8 feels to me like the risk factor is doubled, not reduced.