In many cases, the /dev/disk/by-path symlink is the only way to stably identify a disk without having prior knowledge of the hardware from some external source (e.g. a spreadsheet of disk serial numbers). It should be possible to specify this path in the root device hints.
Metal³ is planning to allow these paths in the `name` hint (see
OCPBUGS-13080), and assisted's implementation of root device hints (which is used in ZTP and the agent-based installer) should be changed to match.