for any more complex orchestration I think you’ve moving to k8s or something more serious
I guess it depends in your use case. If you’re taking about “regular” applications LXD/LXC might not be your best fit. LXD/LXC seem to very good for the more low level infraestruture related solutions. In contrast, whatever is typically deployed with k8s that is mostly immutable very reproducible and kind of runs at a very high level.
LXD is more about what might power that “higher level” layer, more about mutable containers, virtual machines and very complex stacks that you can’t deploy with docker most of the time. As excepted people with those needs greatly leverage cloud-init and Ansible in order to get the reproducibility and the automated deployment capabilities that the Docker “crowd” usually likes.