There are only two (as far as I know) MF lenses that are really fast. The Hasselblad 80mm F/1.9 @ $4800 and the Hasselblad HC 100mm f/2.2 @ $4400. To defeat the FF DOF war...it's another huge chunk of change that has to be laid out.
Fuji just doesn't have the lenses.
The Fuji camera body is just the beginning of a thin wallet. The lenses will do the rest of the thinning, and for it's really one purpose...product and portrait photography.
Medium format is a niche system, as opposed to the all around FF bodies.

Folks the reason there is normally blackout with mirrorless cameras is: Mirrorless cameras black out because the camera has to close the mechanical shutter and clear the data off the sensor before it can re-open the shutter to expose the sensor for the LCD or EVF to display the scene. It is not about not having a mirror. The blackout is caused by the mechanical shutter opening and closing.

You might assume then that when shooting in electronic shutter ,all mirrorless cameras or DSLR cameras when in electronic shutter mode would have no blackout. Not true as electronic shutters in all mirrorless and DSLRs read the sensor row by row from top to bottom and that still causes delay to clear the data before the EVF or rear LCD can reset. That is the blackout in electronic shutter operation.

But with the exclusive stacked-sensor of the Sony A9, A9II and now A1, the sensor readout is so fast (only a full global shutter would be faster) so there is totally no EVF blackout in the A9, A9II, and now A1. No other digital fullframe cameras can claim that, though some are better and have reduced blackout. But until they have a stacked sensor or a global shutter all other fullframe cameras will have some degree of EVF blackout in electronic shutter shooting as well as mechanical shutter operation.

I have to teach this stuff to my University Photography course students, so I have to be correct on the physics and technology . I realize that unless you understand the uniqueness of the Sony-exclusive stacked-sensors in the A9, A9II and now A1 it can be confusing.
Cheers

I pay my full taxes just like everyone else and have for the past five decades, so please don't act like you are taking care of me. When my photography business takes a loss, or my equipment wears out, I am allowed to deduct business losses and depreciate my equipment just like millions of other US companies, big and small.

I have worked hard from the bottom up to have my career, fighting injustice and racial prejudice and more to have an opportunity like other photographers. I have risked my life covering war and broken many parts of my body in the most dangerous and horrible working conditions to provide the news you take for granted when you look at a newspaper or magazine or turn on your TV from your easy chair. I chose this as my avocation and my passion and I make no apologies for being finally able to afford the gear I need to do my job.

Feel free to share your opinions about the A1 and whether or not it is anything you like or not. You don't have to be able to afford it to have an opinion about it. We all love to share our interests as a community of photographers, amateur to professional . We are all equals here at UHH and everyone's photographic opinion and experiences matters the same.

Just don't make it a personal tirade about budget inequities. I work as hard for my money as anyone, always have. Cheers