The fleet maintainers have taken a hard stance on keeping fleet simple with "just enough" features. This line has been worked out to be resource scheduling -- f

The fleet maintainers have taken a hard stance on keeping fleet simple with "just enough" features. This line has been worked out to be resource scheduling -- fleet will stick to unit colocation, simple fan out via conflicts, machine metadata and pinning to a specific machine id. If you need to do hardcore bin packing, using one of the other schedulers is going to help you with that goal. Fleet is a great tool for bootstrapping those schedulers. For example, in Tectonic, fleet is used to run the Kubernetes control plane and related services.