As long as you only got NICs with different permanent MAC addresses installed that does not matter for getting actually long-term stable names.
And for the other case you can still fallback to the other policies, it still will be much more stable by default.
Please note that I don't say that MAC is perfect, but using something that is actually tied to a NIC itself would fare much better by default compared to the NICs position as determined by a bunch of volatile information, and what normally does not matter to me at all, as e.g., I will always use a 100G NIC as ceph private network while the 25G ones as public one, no matter where they are plugged in. That someone configures something by location is the excpection, not the norm.
And for the other case you can still fallback to the other policies, it still will be much more stable by default.
Please note that I don't say that MAC is perfect, but using something that is actually tied to a NIC itself would fare much better by default compared to the NICs position as determined by a bunch of volatile information, and what normally does not matter to me at all, as e.g., I will always use a 100G NIC as ceph private network while the 25G ones as public one, no matter where they are plugged in. That someone configures something by location is the excpection, not the norm.