I was having a conversation about video games with a friend, and we got to talking about frame rates. I just got a 144Hz monitor, and my friend swears that he will stick to 60Hz, because there is no benefit to multiplayer games. We had this conversation with Rainbow 6 Siege in mind, but it should apply to (most) any multiplayer game.
His position is that since the games server has a tick rate of 60 (50? 64? ...somewhere around there), a frame rate higher than that won't help you at all. Any additional frames that you are rendering are essentially a waste of time because there's no additional information, you've already gotten all the information the server is able to provide.
My understanding of these things is limited, but aren't there some kinds of prediction and interpolation that happen client-side, which a higher frame rate can take advantage of, even if they are happening faster than you are receiving updates from the server?
So my question is: what, if any, are the benefits to running a frame rate higher than what the server is able to provide to you?
Please keep answers to quantifiable things, not "higher frame rates feel better". And although we were discussing R6, a game agnostic answer would be great as well.