Good design: Modular keyboards with replaceable switches

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Such are made by multiple companies now, even some cheap Chinese ones have such feature (usually based on gateron switches).

Another big thing is simpe micro-usb based detachable cable. So you can replace broken one very easy.

Vitaliy_Kiselev

Latest trend in top made Chinese keyboard is Gateron optical switches

Here it is no mechanical contacts inside switch, it only crosses the IR light beam.