I'm not a BEAM user, so I may be wrong, but as I understand it, that's not really true. Two VMs are isolated at a much more fundamental level which matters for

I'm not a BEAM user, so I may be wrong, but as I understand it, that's not really true. Two VMs are isolated at a much more fundamental level which matters for security and containment. For example, two BEAM process, while they don't have direct access to each other's memory in the sense of say global shared variables, still have access to the same physical memory, the same disk partition, the same file descriptors, the same sockets, etc.. So I'd imagine there's potential utility in still running inside docker, as a means to deploy the expected OS, the correct assets, the version of BEAM itself, etc. And there are reasons to isolate all that with VMs, to prevent sharing of machine resources like disk, file descriptors, sockets etc.