I have severe coordination problems, severe sensory problems, and chronic migraines. I have to be very careful to avoid accidental tapping and accidental gestures. If I trigger flashing or zooming, the device will trigger migraines. Not fun.
So some of us can be more than "bothered" by touch.
That said, I used an Icarus Illumina e653, and only had a couple zooming problems before it broke. I wish there were more button-only devices, but I wouldn't rule out button+touch.
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