Hey it's a pagan article of the day, two days in a row!
http://paganbloggers.com/critter/blog/2017/05/09/on-pagan-writing-styles/
This one is actually really relevant to the conversations with @literorrery et all last night!
@indi Yeah, this is exactly the kind of note I want to hit. The word I was looking for when I was trying to think of this before was "case study." Everyone's magical system is a case study in how to apply the theories of metamagic. Not every system will use every example, but here's three reasonably fleshed-out examples and how they do use the theories, as well as a bunch more places to go look for inspiration.
@indi @literorrery this is why I love RAW's stuff so much