Currently running Sram X01 which I think is well maintained and shifts no worse than it ever did when new. Recently had a go on a bike equiped with XTR which seemed much easier so am wondering what else might be out there?
I’d suggest that your X01 setup could be improved if this is the case… New SP41 outer, proper 1.1mm slick inner cable… Worth giving it a go for a few quid. I have X01 on 3 bikes and it’s quite a bit lighter than various XT 12spd setups I’ve used, and though XTR is lighter than XT it wasn’t any lighter than my own X01 setups.
If it’s a real issue like you say it is though, I’d just get a GX AXS setup ASAP and bung it on the credit card so you can keep riding… Because there’s no physical effort required to make the shift, it’s a much lighter action. I didn’t get on with it myself for ergonomic reasons, but it would be perfect for what you want. Also there will be pretty decent residual value in your X01 shifter and mech too so shouldn’t sting too much on the purchase price…
Hate to say it, but would gripshift help?
Or this… Gripshift might be unfashionable these days, and obviously no good for really technical riding, but if you’re not pushing the envelope and/or more of an XC bimbler anyway, arguably Gripshift should still be a lot more popular these days than it actually is!