And what happens when you are not at home or simply forget to unplug when electric storm hits?
![Duh :duh:](https://www.audiocircle.com/Smileys/audiocircle/duh.gif)
Also sometimes Electricity Utility technicians do something really stupid that can fry your appliances.
Therefore, I think, surge protector is a must (sacrificial type). Your local electrician/contractor can give you advice on good ones that come with insurance warranty (mine covers 5000 USD) and are not that expensive.