I'm not disputing that CRTs have lower input lag than LCDs or OLED. I was disputing the specific 50ms of lag claim that the parent post made; modern LCDs aren't that bad, and OLEDs are getting to a point that it's getting close to undetectable to human eyes. Even with horizontal interrupts that could be done between scanlines, there's still a limit to how fast we can actually perceive it (and frankly I'd be skeptical of anyone that claims that the 8ms of input lag that an OLED is actually affecting your gameplay).

For light gun games, yeah, that timing might matter, but I'm not convinced it matters anywhere else.