Worth noting that the expensive price isn't because of the metadata feature - it's a new version of the Leica M11 which is $8995 itself (Leicas are just crazy expensive)
However, I think the digital signing is a good way to provide the photographer with proof that the picture in the paper/competition is the picture that they made with the camera and not their pal Midjourney.
Why they put it in such a sluggish contraption, I don’t know, but probably a good place to start compared to a Z9 and trying to tag pictures at 500 frames a second or whatever.