With this new scheme you now get:
* Stable interface names across reboots
-* Stable interface names even when hardware is added or removed, i.e. no re-enumeration takes place
+* Stable interface names even when hardware is added or removed, i.e. no re-enumeration takes place (to the level the firmware permits this)
* Stable interface names when kernels or drivers are updated/changed
* Stable interface names even if you have to replace broken ethernet cards by new ones
* The names are automatically determined without user configuration, they just work