I think there is a benefit to it when it comes to effects processing, vitural instruments, and the actual process of mixing multiple tracks together, in general, in some cases. When I've tried mixing 96kHz tracks vs original 44.1k files , the entire mix seems to come together much easier. I personally think the mix process and blend of instruments sounds much smoother and less harsh.
But, yeah, I've been doing this for many, many years, and am totally aware of when increasing audio resolution has a purpose, and when it doesn't.