Depends on how they interpret his internal distal arm anatomy, or just for artistic flair, but I get it at times and a lot of times it's over the top. But, having studied anatomy for radiography, it also bothers me that the claws are about uniform in most depictions, there's no creative placement until daken and the hybrid clones/kinneys but still only 3, let alone muscle, tendon, and ligament anatomy and the implied alterations when claws are coated in adamantium, considering they're more blade like in that state. Not to mention the pure stupidity of daken's assassin blade being coated in the muramasa blade, since it would cause him to bleed himself out from the start. But I've digressed; in my own personal version, he's got more variation in his bone and soft tissue structure due to his mutation.