Electronic metronomes can be very annoying. They beep and tock and ding and generally make obnoxious sounds in various patterns. There is nothing fluid about them; they just trigger at intervals and then go silent 'til the next time math and electricity combine to shout another tone.
On the other hand, a good old-fashioned mechanical metronome has some flow to it. It's always moving, progressing from tick to tick. [For those of you who like car analogies: I also prefer analogue speedometers to their digital counterparts.] Even when it isn't ticking, it provides a visual clue as to the progress of time.
It comes as no surprise, then, that there are no electronic metronomes in the picture of the day.
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If you've been to the Magic Kingdom or another Disneyland clone (as kamoranakrre has), then you may've seen the attraction called The Timekeeper, which featured Robin Williams as the audio-animatronic inventor of a time-travelling nine-eyed robot. It was a good show, despite having to stand (with the assistance of lean rails) throughout.