Maybe they won’t bother. As much as I love the XX1 on my bike, when I need to replace the cassette, chain and chainring, I’ll be considering XT if I keep in mind the cost of a XX1 derailleur. The price disparity is very hard to ignore, and I’m sure others will think the same.
Surely a GX cassette then? Lighter than XT, keeps the 10t and no change of freehub, for pretty much the same cost as XT. I think they last much better than XT too.