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"Almost every modern laptop and smartphone has at least one USB-C port"
Actually not true. Only high end laptops and some brands and a minority of phones because it costs more and needs an extra chip in most gadgets. Many SoC as cheap even as 50 c have built-in USB, but only the actual USB. USB-C includes three other systems.
However the problem is not really the cable, except it's too small a connector for all the signals.
Also the up to 100W and 20V part was included to charge laptops, but some take more than 100W and a 100W charger is overkill and wasteful and larger than needed for a gadget, phone or tablet (typically 0.5W to 7.5W).
A recent industry report (not retail media) said apart from certain makes of laptops the takeup of USB-C has been disappointing. It's because most phones, many tablets and all lesser gadgets don't need the extra hardware expense and software complexity.
It should have been called something else.
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