Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

NW pulleys on my SRAM RD are just annoying. It's possible to make the upper pulley skip a teeth, then it won't engage properly and you have to put with the noise until it jumps back to the right place or do it by hand and get greasy fingers

I thought the point of NW was so the chainring didn't throw the chain so easily.

What's the point of having it on jockey wheels which are surrounded by a cage?

I don't know. The Shimano pulleys don't have narrow/wide profiling, that I can see:

And the SRAM 12/14T pulleys from Kogel (which matches what the mech ships with) have a narrow/wide profile on the lower pulley, so I'm assuming that the reason they specified the 14/14T set was that they didn't have it.

But @TotalShanner had no issues with his Shimano HG+ chain on the lower pulley wheel, so who knows?

What's the point of having it on jockey wheels which are surrounded by a cage?

Its a good question. I dont think there's any logical answer.

Up until 12 speed eagle sram used NW teeth on both jockey wheels.
But the top jockey wheel would sometimes go out of sync with the chain making it feel rough. Changing gears down then back up the cassette would fix it.

But now on 12 speed eagle the top jockey wheel doesn't have the NW profile but the bottom one does.
But why? I've yet to find a good answer.