Serious answer to not so serious question: Fast design iterations for mechanical designs is only possible since we have CAD.
Humankind's greatest inventions: - Wheel - Calculus - Microelectronics - Luggage on wheels Why did the last one take so long!?
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The materials that go into 360° spinny wheels must also be pretty ridiculously robust. However even fixed edge wheels are relatively new.
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Travellers used to have servants to carry their luggage. Doesn't explain why wheel-less cases survived quite so far into 20th century though
Thanks. Twitter will use this to make your timeline better. UndoUndo
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A KUFX DJ claimed the three best inventions we're motorized transportation, mechanical refrigeration, and amplified sound.
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Hard to argue with that when I'm driving on a hot day with AC on and listening to good tunes on the radio.
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