My iPhone 4S has 0 moving parts, yet it had failed WiFi after 1 year. My Macbook has 0 moving parts, yet it had failed SSD. My Renault Logan has quite a lot of moving parts, yet I use it for a few years and almost 100 000 kilometers (and that's quite a lot of movement in extremely different weather conditions, from -40 to +40) and I had very minimal maintenance outside of regular oil change.

While I generally agree, the point is, even when there are no moving parts, there's a lot of failure points (temperature, vibrations) and manufacturers will create faulty devices, no matter what. If device is too good, they will cut expenses, until it'll be "good enough".