PWM is vital; I can melt chocolate on my stove today but “low” often is 100% power at 90% off 10% on and burns food. Also making sure the boards and chips are hefty enough. I don’t trust Samsung and LG to lay enough of a trace on the board or use a sufficiently large heatsink on the switching circuitry that it’s not going to melt through when I boil water daily. I don’t recall details but last time I was looking into it, even some higher end brands had failure rates after 5-10 years (or sooner if the “power boost” or whatever was used because they cheaped out. My gas stove will survive the apocalypse, but whether it survives the Operation Epic Fail is another thing.