[porkloin]

Honestly even in "developed countries" it's not worth blindly trusting that the power in your house/building is clean. It's cheap and easy enough to just put any expensive hardware on a UPS rather than speculating what's going on behind the walls.

[nerdsniper]

I work on embedded systems. I can often see whether my A/C or other appliances are running on my oscilloscope signals. They often affect the output of USB power supplies.

[eru]

Eh, if these surges are rare enough, then you are statistical better off just risking your 'expensive' hardware to a one in a trillion possibility rather than spending money on gear you don't need.

Do you live in a bunker to protect against artillery shells?

[xandrius]

Doesn't even sound like a developed country to me. Is that the US or something?