What is the difference between a hard switched vs soft switched architecture in power converters
ZVS/ZCS requires a LC tank and the converter is resonant or quasi resonant type. It can change frequency (quasi resonant) VS. load or it implements some other modulation, for example PDM, or pulse skipping,...
Of course this is not an option for the motor control which requires a SVPWM or PWM modulation and has no LC tank, but who knows what will be in the future.