You've spent a small fortune on all your precious computer hardware. These little strip devices, are only designed to stop very small overvoltage spikes, which are rare. Most likely and more common occurrences are voltage drops.
Brownouts cause lights, TV's, appliances, etc. to dim or slow to less than normal.
Many devices will not operate under these conditions. Blackouts kill all power immediately. Corporate IT departments are well aware of the numbers and costs. The local power utilities do their best to provide a constant regulated power supply to you, but failures for various reasons are inevitable. Acts of nature, and device failures are just two examples.