I agree that an electronic tuner can be a handy device to have but serious musicians have been doing fine without them for… let's see… oh, yeah, all of human history save the last 25 years or so.

In my opinion, an electronic tuner is a poor substitute for tuning one's ear. Hand a perfectly tuned instrument to a musician with no ear and you still have a musician with no ear. On the other hand, a musician with a trained ear can tune quickly and accurately without an electronic tuner.

      - Mark