The performance difference is huge. A few years ago I launched an interactive consumer app on very resource constrained devices that would have been impossible

The performance difference is huge. A few years ago I launched an interactive consumer app on very resource constrained devices that would have been impossible with React or Vue (I empirically tested both). Think dual or quad core 1Ghz arm processors with zero GPU acceleration running electron. The only optimization I had to implement was virtualization when showing hundreds of off screen images (an optimization I would have had to implement regardless of framework).