There are some examples of cases where "overengineering" actually ended up being the reason for success: Indian Motorcycles vs. Harley Davidson in a bid for the WWII US army motorcycle. Harley Davidson won when they delivered a motorcycle that exceeded all of the require parameters.

Similarly, people might say the MacBook Pro is overengineered with the aluminum case, but it is a ridiculously solid laptop that I'm not afraid of my kids touching.

The point, sometimes overengineering is meerly making something substantially better in some particular way that it becomes more useful.