Thanks, great points. It's true, ABS can provide helpful feedback. On several occasions I had to abort cornering and keep going straight, because I once the ABS was engaged I knew there's no way I was making the corner (this was low speed on a patch of ice covered by fresh snow).

Also, I find the electronic stability control system extremely useful for detecting black ice. A slight acceleration attempt provides instant feedback if the road is slippery, but not immediately obvious.