This past year I have stopped using index shifters all together, not that I am against them, and my main commuter bike is fitted with friction DT shifters and previously with friction barcons. I learned quickly and now I can shift with speed and ease. Plus, it keeps the commuter relaible. There is very little chance I won't be able to shift if anything happens short of the cable snapping or the derailer getting damaged.
goodness gracious