Conductors aside from very small resistance it has also very small inductance and capacitance depending on the length, distance of separation and the size of conductors, also as per Von Ohain mentioned. Most cases for low frequency like 60Hz it’s negligible except for long distance power line. Our power plant uses kHz especially at full power which has the maximum frequency. These frequencies produce very small inductive reactance (XL) and capacitive reactance (XC) which is not present on DC circuit. XL is in series while XC is parallel with the line. At high frequency as XL is present voltage drop is also present because of the current that passes thru the line. This slightly reduced the power delivered to the motor. Most cases this is not a problem in our hobby because of extra power. However considering efficiency this is a factor. In order to eliminate this, as per Von Ohain mentioned put the 3-phase cable together, it increase shunt capacitive reactance as the frequency increases. However if the cable is longer enough to produce area between cable due to the insulation and capacitive reactance is not enough because of dielectric materials, then a tiny capacitor might be required at the motor side. This capacitor must be close enough to the resonance frequency otherwise it becomes load also at higher frequency. Lastly is to increase wire size. Well, there are plenty of options on doing this since we can increase voltage and drop the current on either side. I agree with Von Ohain as there are advantages and disadvantages.