But it is still good to have some form of protection using an extention cable with protection, with surge protector strips, to prevent other equipment malfunction to affect other equipments.
If required, then dimmer switches and clocks are failing due to daily noise generated by other appliances. Each does not fail because invisible surge protectors are used? Of course not. All appliances already contain superior protection that makes that noise or mythical anomalies irrelevant. My invisible protectors must be working? If power trips and other appliances cause damage, then I must have invisible protectors on everything.
Same protection exists whether I use a protector strip or not. Either my protectors are invisible, or better protection at electronics is already inside electronics. The latter is true.
They have you boxing with invisible fears. Spending on protectors that claim near zero protection and near zero filtering. Did you read its spec numbers? When no damage happens, was it a protector or better protection inside each appliance?
Read its spec numbers. Post then number that claims protection from anomalies that actually do damage. Your concern is a rare transient, maybe once every seven years, that can destructively blow through undersized power strips. And is sometimes is so powerful as to also blow through electronics.
Too many believe hearsay and ignore spec numbers. For example, where is a power strip that stops hundreds of thousands of joules (the destructive anomaly)? Does 'no damage' mean a power strip is protecting? No. No damage means better protection inside each appliance is working. Protection inside every appliance - including a door bell, air conditioner, refrigerator, and smoke detector - means stress created many times every day by other appliances is only noise. Or do those unharmed items also have invisible strip protectors?
Finally, if a Earth Leakage Circuit Breaker is worn out, then someone was physically resetting it many times a day. If it was not tripping daily, then no wear and no reason to replace it. And if anything needs a protector, then so do electronics inside a leak detecting breaker. What protects it? Protectoin superior to a power strip is even inside that breaker.
The concern is a rare transient, maybe once even seven years, that is completely ignored by power strip protectors. That is solved by something less expensive and that actually claims to protect from a potentially destructive and other anomalies.