@aburka @mcc well, there is Linux Compat for NetBSD that is somewhat compatible with Linux 4.x and can run a bunch of software, and there's Linuxulator for FreeBSD that tries to catch up with the Linux kernel, both are successful but only to an extent.
Speaking of docker, there's podman for NetBSD that is backed by qemu, running real Linux kernel with hardware virtualization. I didn't have much success with running it, but if I figure out how to make it work, it should be possible to run a lot of stuff this way.