Fender length only matters for short dutch-style trips of a few minutes. If you ride far enough and fast enough in sloppy weather there is pretty much no measurable difference between
>>1850473and
>>1850597. It's a bit like waterproof apparel, you can keep it out for a while, but past a certain point gear that helps you peacefully coexist with the problem makes more sense than any futile attempts to create an impenetrable forcefield