Actually the LBS did suggest that failed bearings could lead to axle breakage. There wasn’t any advance signs though.
I think the main difficulty will be sourcing the replacement parts required. Hub is C’dales in house “CZero”. Googling hasn’t identified whether this is actually any mainstream manufacturers product or something bespoke for C’dale .
Former would be preferable, just identify who made the hub, source the parts and get them fitted. The latter is probably a bigger cost and lengthy delay.
It’s all putting me off unbranded OEM parts. I can see how it helps get a bike to the shop for lower cost, but PITA to repair.
I wouldn’t be surprised if I end up being advised to rebuild the wheel on a new hub. Any recommendations for lights and easily serviced? Hope?