its not cheaper than xtr though is it. (discounted prices here, not RRP)
xx1 cassette £289.99
XTR cassette £135.99
xx1 rear mech £191.99
Xtr rear mech £111.99
XX1 shifter £111.99
XTR shifter £55.99
XX1 chain £42.49
Xtr Chain £31.99
XX1 chainring £55.99
Works Components ring £35
Not forgetting to make xx1 work:
XD Driver £30-60 depending on wheel
XX1 Chainset (comes with ring) £232
that makes a 1x10 XTR conversion come in at £370.96
to go to XX1 (i'll forget the chainset now and assume you have that for a fair comparison) £679.96-£709.96 depending on your wheelset.
Why would you buy it when XTR is literally half the price for a 1x setup? yes xtr gets close on price when you start looking at front mechs, shifters and chainset, but we are talking 1x drive-trains here.
and before anyone says "ahhh but you don't get the gear range..." i don't need it or want it. this works for me and has done for the last few years, the super wide range of xx1 was for me, rubbish.
I'll stick with the absolute best there is, Shimano XTR and a holiday to use it.