Better to be able to use your camera back than not, plus it can be used for 116/616 also and that you can't get fresh. All the other 70mm stock left is kinda old... I haven't seen any that I haven't had to mess with a lot to get to expose decently.
I get what you mean if you compare it, but hey, it's available, and guaranteed, couldn't hurt to get a roll, if you have or want a 70mm 6x12 back for a graflock, it saves a LOT of changing rolls when you only get 3-4 images per roll haha.
Anyway, I hope you decide to grab one at least.