Reason this is good is because the power setting really only affects how often the magnetron switches on and off (usually easy to hear). Lower power = more time off. Many microwave foods say to let it rest for a few minutes, this integrates that into the process(but they’re all different so do experiment)
Except with proper microwaves that actually reduce the power. I’m not sure if it’s just Panasonic, but look for microwaves that mention inverter technology. Essentially they convert AC to DC, and then back to AC in a more controlled and adjustable manner.