I'm currently involved in an effort to rip out docker swarm at work because its overlay networks are shockingly unreliable. LXD looks interesting but https://linderud.dev/blog/packaging-lxd-for-arch-linux/ convinced me that it's another Canonical NIH special and probably best avoided (in particular, "only distributed for Ubuntu via snaps" means "forces auto-updates" which means "not going in my environment"). Need to try Nomad; I'm cautiously optimistic since the rest of HashiCorp's stuff is good.