* The only protection available as a consumer add-on.
Sure, if the manufacturer wants to increase the cost on the BOM for their PSUs, they can use additional components to survive dips, but who does that on disposable electronic equipment? Hell, even "expensive" TVs don't. I quote expensive since you can now get 65" 4K TVs cheaper than a mobile phone, but that's a tangent. So if you are wanting to protect your electronic equipment with another device readily available that is just plug an play ease of use with no knowledge of electronics, what do you suggest?
I have a friend who did that; he put one of these relays on the apartment's power panel, so the whole apartment was protected against voltage dips or too short outages. It might not be a common consumer item, but it's a readily available device, AFAIK commonly used to protect industrial motors.
Sure, if the manufacturer wants to increase the cost on the BOM for their PSUs, they can use additional components to survive dips, but who does that on disposable electronic equipment? Hell, even "expensive" TVs don't. I quote expensive since you can now get 65" 4K TVs cheaper than a mobile phone, but that's a tangent. So if you are wanting to protect your electronic equipment with another device readily available that is just plug an play ease of use with no knowledge of electronics, what do you suggest?