Alu/Steel or even PP/PU plastic. Aside from aesthetics vs carbon, I have noticed that the carbon cages I bought (for around 700-800NT) are flexy and sturdy at the same time. I’ve yet to have a water bottle spill when going over bumps on the road. I won’t argue that carbon is better than other materials, but I personally prefer them.
I just finished testing full carbon mid section rims from a local brand called Roxycle (How was your ride today?) and I can safely say they aren’t for me. Very nice when we were on the flats and I couldn’t really feel a huge difference when climbing, but I was almost blown over multiple times during descents AND going from hydro disk brakes to carbon clinchers were complete opposites.
The price tag of 35-40k NTD is also too much for me.