Adobe Lightroom has always faced some stiff competition against Phase One’s Capture One for medium format shooters. Even many photographers using DSLRs have made the switch. If you were hoping to use Capture One with the new Fujifilm GFX, though, you may be out of luck.
Imaging Resource seems to think that Phase One are feeling a little threatened by Fuji’s new mirrorless. But I don’t necessarily think that’s true. At least, no more threatened than they’ve felt about other medium format cameras in the past. According to Phase One support, support is unlikely to come as they don’t want to support “direct competitors of our core business”.