It depends on your base frame rate that the card can actually render. For example, if your card can only natively do 30 fps, Frame gen will just show you a higher number, but the latency and smoothness will feel like 30 fps. Frame gen only makes sense if you already have a high base frame rate. That’s why they’re called fake frames.
People are going gaga because they don’t know how frame gen actually works. They think you just get free performance.