There are many qualms to have with it as an OS

• It demands both a dock and a title bar, a huge waste of vertical space on screens that are vertically limited

• There's no way of globally enabling hidden files and folders (you can do it for finder through the terminal, but can't do it for the file picker windows)

• It doesn't support multi-stream transport, so despite being all about simplicity you cannot display more than two display port screens over a thunderbolt connection, whereas windows can do 4.

• It doesn't support sub pixel rendering, making text look blurry AF on 1080p and any other screens that aren't super high res