i never had anything like that
I don't remember anything like that happening and causing a device failure.
This is the same thing I hear from folks about ESD damage. They believe it is not problem because they have never seen it - just as you have frequently done in this thread concerning power issues.
The problem with those arguments is that you (as a human being) can't see it. So how do you know a failed device was not damaged by a destructive surge or spike (or ESD)? You wouldn't.
An ESD sensitive device like a CPU or memory module can be destroyed by a static discharge that is so tiny, we (as humans) cannot see it, hear it, or feel the electrical arc (spark) leaving our fingertips. But that invisible, silent arc effectively torches a Grand Canyon sized scorched trench (microscopically speaking) through millions and millions of transistor gates on those sensitive devices! Essentially total destruction that can only be seen under a very powerful microscope.
The difference with power anomalies is they don't have to be one big one to do the damage. In fact, in many cases, it is a series of smaller surges and spikes over a period of time that just bang, bang, bang, bang, and bang on the device, wearing it down until it can tolerate the anomalies no longer. It is these frequent bombardments of smaller surges and spikes that routinely wear out surge and spike protectors, which is why it is recommended those devices be replaced every two years even though they "appear" to still be functioning just fine.
In other words, you don't have to see a lightning flash, hear the thunder, or see the lights flicker to have a power anomaly take out a computer power supply, big screen TV, home theater audio gear, or whatever. I mention those items because yes, I have a big UPS on my big screen TV and home theater gear too. I even have my 30 year old APC Smart-UPS 900 on my garage door opener (though that is there just for full power outages).
Some folks will say they have "whole-house" surge protection installed by the power company so they don't need an UPS. Wrong. A whole-house protector will protect from power anomalies originating off the grid. But as I said above destructive surges and spikes can originate from within the house too - from a faulty high wattage appliance, for example.