BFI sounds like a recipe for eye strain in a dark room where every single second frame is off. That’s like a strobe light to some peoples eyeballs. I am sensitive to PWM issues and while I haven’t seen the implementation on OLEDs, as a computer monitor in a dark room that doesn’t sound like something I want at all.
Yea that and lack of VRR make me never use BFI in practice on my CX. But like the guy above said it's optional and more options is always good as long as they are of use to some.