Why isn’t there a hi-tech alternative to the windscreen wiper?

Photograph: RONALD GRANT

One of the very few parts of the motor car that has remained virtually unchanged for 100 years is the windscreen wiper. Why hasn’t anyone come up with a more hi-tech solution for clearing rainwater from windscreens than a squegee blade mounted on the end of a metallic arm?

Nick Jones, Hereford, Worcs

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