I do like do slowly read through Chess games, especially old historic games. I do the same with the game of Go: I like the several hundred year old Shogun Palace games. I did take online lessons from a Korean Go master a few years ago, and once a month play a long game against CSPro Go program, let it spend an hour after the game analyzing my moves, then I look at what moves I should have played in critical parts of the game.
I guess what I am saying here is that different people enjoy games differently, and I respect Magnus optimizing playing Chess for his own fun and lifestyle.