Actually that’s a good point the UCI rule change that has sort of triggered the current push towards discs in CX (rather gentle compared with other cycling industry technology/marketing pushes) was probably brought about more by cycle industry pressure than rider demands.
Those consumers with the most interest in disc braked CX bikes (including myself) would probably use such bikes primarily for recreation and commuting before actual racing…
The slower, patchier adoption of discs by serious CX racers suggests the perceived benefits are more towards the commuter/leisure rider (already used to discs on his or her MTB) than the serious competitor who isn’t keen on a heavier stopper when the extant bit of kit does all that they need for ~200g less…
I still fancy a disc braked 700c wheeled bike but I doubt I would do much actual CX racing on it…