It might work in the short term.

If the rollers are bigger, that increases chain wrap radius (the chain is further from the cassettes center), which in turn shortens the distance between rollers relative to the sprocket teeth. So the roller will have to slide from one side (just slightly off center) of the sprocket recess to the other during each revolution.

When everything is new, this might be mostly fine. But it will create uneven wear on the cassette, accelerate wear on the chain, and increase friction.

As said above "I could see less chain engagement on the AXS cassette, but the premise is using a different cassette and likely a different chain."

Then you're just moving the same issue to the AXS chain ring

Maybe. People seem to be using non-Flattop chains in road AXS setups without any obvious problems. Garbaruk makes a 107 BCD chainring (for AXS) that they say works fine with any chain as well. I'm all for experimenting and finding out what works. It's been years of being told that things aren't compatible when they really are in practice.

I have to say I agree with you on the service lately. I sent one in and after 3 weeks sitting on a self they sent it to my old address in Texas from 2012, was a nightmare getting it back, actually chalked it up as a loss but 10 days later was at my door in NC. Sent another in and had it back in a week so go figure. I think when the new Shimano Power system comes out, I'm going to give that a try. I like the look and ratio options of the new DA9200 cranks.

Yep, time to change cables when they are no longer feeling crisp. Way easier to change out an intact cable, than performing surgery on your shifters trying to retrieve tiny wires that have broken off the main cable.

Waiting until the cable breaks is a mistake you only make once.....

This release is a huge let down for me. Ive read many release articles and listened to the marginal gains interview.

Semi wireless (with the capability to still be fully wired...) is not really that game changing. They just repackaged XTR chains and rotors as dura ace, nothing new or exciting there and the rotors look worse than old. For TT and tri bikes, no new remote shifter options, you have to do a firmware update to older parts and run the system fully wired?? Really?

I ride Shimano. Massive respect for the brand and what they do for cycling, but I just feel like they missed the mark here.

The only possible update the rim brakes might be getting is a different finish to match the aesthetics of the 9200 components. The 9100 brakes will do just fine.

All you'll need to hunt for will be the 9250 shift levers for rim brakes.

Why would the corresponding levers be any easier to find than the brakes?

I didn't suggest that they would be. 9100 rim brake calipers are pretty easy to get now so there'd be no need to hunt for 9200 calipers unless you have to have matching finishes.

Yep, I'm using a AXS flat top chain (Force AXS group) on a supposedly 11sp NW chainring - some non-brand / chinese thing I bought on Amazon - and it runs flawlessly.
I would also be very keen to try a 11-34 Shimano 12sp cassette on my gravel bike and IDT where I don't need a 10 cog and save me having to get XDR drivers. Figure I could use that with a 12sp eagle or shimano chain and my Amazon chainring... will update if I ever get there.

Is the chain line the same between AXS and new 12spd Shimano? For some reason I thought SRAM fiddled with the chain line on AXS to adjust the system to try and better hit the sweet spot with both 1x and 2x.