It's possible you and your acquaintances can't tell. Similarly some people claim they can't tell a difference between a 720p video and higher. Or that they can't tell a difference between 128 kbps CBR MP3 and higher.

However the differences are real and have been measured. [1] [2] You are welcome to argue that the performance work isn't worth prioritizing, but don't fall into the trap of claiming the performance gap doesn't exist.

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[1] https://pavelfatin.com/typing-with-pleasure/

[2] https://danluu.com/input-lag/