Power surges don't happen often in real life, so this is one of the protection I would question.
Years ago at my house we had power spike when duck flew into high voltage lines.
The estimated 400V blew few TV at neighbours, while I had digital dishwasher blowing fusible link, answering machine blowing the $5 charger and computer power unit went out at $40.
I hear autoformers are good, but carrying plug-in meter I can monitor the hookup voltage, on rare occasions when I have one.
The only thing on my TC that can suffer from low voltage is AC and those usually don't mind it low till they come to cycling.