I just went through all of the easy ones and most of them seem "obvious", but some of them seem like preference (like the separator width). Another one I noticed is medium 6, where I'm not sure the smaller icon is necessarily always better. I'd be careful taking something like this as gospel without careful scrutinization. A lot of it feels like modern UI dogma which likes to waste space for no reason other than aesthetics, rather than actual UI research. Some of it just feels completely arbitrary.
