The thing with these kinds of stripped down versions of Windows is things will be broken. You may not know what those things are, but if you go beyond the scope of the what the stripped down OS is targeting, it likely won't end well.
To put it in an analogy, a road legal car doesn't need a lot of the things that came installed when you bought it. You can trim off those things if you want to squeeze every bit of performance out of it. But the moment you do something other than take it to the track to play around with, it's a useless metal box and it's unsafe for anyone else but yourself to ride in. And even your own safety is a crapshoot.
EDIT: I saw Atlas's linked video to LTT and one thing that stood out was Linus going "oh my god it's so responsive"
I'm willing to be a lot of that is simply from disabling a bunch of animations and reducing the wait or delay times to as low as possible. This "hack" is pretty well known.