I don't know if anybody else is experiencing this on the new 10.13 os update, but I just feel unspeakable irritation with how CMD+SHIFT+4 behaves now. It slows the mouse tracking speed down more than twice. Even more irritating part: It only behaves with a mouse, not a trackpad (At least I don't feel it).
Each time I feel like somebody hacked my mouse and made it heavier.
I'm not even talking about breaking GIT SSH, then updating XCode which broke all of my command line tools. Is this the Apple Quality we've all been waiting for?