I agree. Shooting in continuous mode is just not something I have a need to use with a camera like the X1D. (I have a Sony A7RII and have never shot in continuous mode.) I suppose it all depends on where you are coming from. If you are expecting the X1D to have the same functionality as a Canon or Nikon DSLR or a Sony A7RII, forget it. I expect that the Fuji GFX will come much closer. That seems to be what Fuji is aiming for. An XT-2 on steroids.
The length of the blackout with the X1D is likely something that can be improved in the firmware.
I don't expect any medium format camera with OVF or EVF to ever come close to shooting in continuous or track like a Canon, Nikon or other 35mm DSLR's, nor should one expect them to. That's understandable and a given. The need though to be able to keep one's eye on the subject while shooting in continuous even with a medium format digital and adjust framing accordingly may be the need of some, depending on application. Again it's not a deficiency of a/this camera...it's simply what one might need or require. That's why even in the given genre of medium format digitals, each camera and system is going to have a feature set with advantages and disadvantages for different types of shooting. Knowing what these advantages and disadvantages are helps one make an informed decision.
Dave (D&A)