One could say the primary use of inductors is for filtering. Take for example a buck regulator. We would agree the inductor is an integral part of buck regulation. It acts as a current filter. But we could remove the inductor and still achieve some sort of pwm regulation. The output would have higher ripple and switching noise. We would then state "it also may not be a bad idea to have a small inductor on the output".
I looked at his BOM. The Power Board has 3 H-bridges: using 3 different voltage rating MOSFETs: 40V, 1.3 milliOhm; 75V, 1.46 milliOhm and 150V, 4.8 milliOhm. There's a Driver Board with 12 x (fet driver chip, opto isolator and dual output dc/dc).