Right and that was another terrible decision. The V/STOL F-35B variant was only practical with a single engine because twin engines would have caused dangerous thrust imbalances during landing. But that constraint forced the F-35A and F-35C models to also have single engines for commonality, resulting in lower speed, higher drag, and reduced survivability. The whole program is full of misguided compromises like that.

Well the F-16 is also single engine, as are a great many other successful fighter planes.