Benefit in listing major rejections in one's CV?
I don't see any particular benefit from doing so, but I know a number of faculty who are taking a sort of principled stand toward showing that, in a lot of cases, academia is just persistently slogging through failure.

There may be some slight benefit in showing productivity that doesn't result in a clear output ("I submitted X R01 proposals, they just didn't get funded...") but I think primarily this is a personal stance and at best will cause someone to nod in sympathy.

I've also seen this talked about a lot in the somewhat more ephemeral and less formal spaces of social media.