I’ve tried X9 and XTR and you’d have to pry the XTR out of my cold dead fingers before I’d let go of it!
XTR is smoother, quieter, quicker (to shift) and harder wearing than any of the current SRAM offerings.
X9 just felt clunky and harsh in comparison.
I’ve got XTR shifters and mechs on 3 bikes and haven’t conciously touched the shifting setup in almost a year. I dunno what you folks are doing that requires constant adjustment. If it’s setup properly to begin with, the cabes aint going to stretch THAT much, the barrel adjusters are all you should ever need in the life of an inner cable. When you run out of barrel adjuster it’s time for a new £3 inner cable.