1/12th seems to be coming back in a fairly large way, I know at the 2 local tracks I run at many people have stopped running TC and started running 1/12th mainly for the competition, and the fun of running those lil missles. But also the cost - they are WAY cheaper than any TC to run. chance of breaking stuff is way less.
But you do go through more bearings in a 1/12th it seems.