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That's good to know, I have never ridden alloy pulleys. I just remember when all the XX1 pulleys were breaking all the time. They do seem to be better now, but still...

But you can imagine what it'd be like if it was! haha. I figured as much.

Hard to tell from photos, but it's possible the group of 9 monobloc style machined cogs could be Titanium, or maybe still steel. If the 3 L cogs are aluminum, maybe they are also replaceable?

This design would definitely improve shifting performance on AXS stuff. On some bikes, especially certain gravel bikes, the weak, flexy, derailleur hangers just aren't stiff enough to maintain proper alignment. This is especially noticeable in muddy conditions. Obviously there are other factors, but SRAM is smart to try and control frame mounting interface for this reason. I'll be curious to see exactly how this mounts to the frame, but my guess is the inner part of the hanger might already be compatible with current UDH, which would make sense, because SRAM has already gained a lot of traction with that...

Hopefully they're moving away from plastic pulleys... I mean, current XX1 AXS derailleurs are $750...