I don't think that is the type of "component" the author means when he writes about a "component world". He constantly talks about his argument applies to "mode

I don't think that is the type of "component" the author means when he writes about a "component world". He constantly talks about his argument applies to "modern web apps". I don't have the feeling that what he really means with "Inline CSS works better in a component world" is "Inline CSS is the better choice since the 90s".