Meh. I prefer the GX cable setup on my E29 over the XTR setup on my XC bike. But the bike came with a full XTR group (including hubs) and It would be a MASSIVE waste of money to buy XX1 to replace it vs the very small personal preference for it.
I did upgrade the GX derailleur with an X01 after bending the hanger and noticing the GX was looking a little beat up. After swapping I didn’t see an improvement, the damn beat to hell GX was just fine. Oh well, dropped a few grams from my nearly 40 pound bike 