True, I was thinking more of terms of automation in installing it, not having to touch anything on the server and knowing that the recovery iso exists.
For my testbed installs of Endpoint, I picked four servers, of those two are roughly the same hardware configuration, and they all differ slightly in OS.
So to minimize any chance of not having the correct drivers or target OS, I'd imagine that most of the time it's a crisis where you need the image, and
to not have to track down any drivers.
Additional thought, how about scheduled recreation of the recovery ISO as well, in case the hardware/OS configuration drifts?