And yet even dedicated gaming keyboards often have 50ms latency or more internally, and the last YT video I've seen on "system latency" actually didn't look at

And yet even dedicated gaming keyboards often have 50ms latency or more internally, and the last YT video I've seen on "system latency" actually didn't look at any latencies and just measured frame render times. I don't know of a single channel that does actual keyboard-to-screen latency measurements. The gaming community may care about numbers but I don't know if most actually know what those numbers say.