It’s a very good review.
The strange thing about Chile (well, there are many strange things about it) is that, at least with regards wine, a 1km move to the East/West can have a bigger climactic influence than a 100km move to the North/South. If you want to see what I mean, Toby refers to wine growing in Chile Chico in his piece - look at google maps if you want to see exactly how far south it is. It is actually further south than the (northern bit of) the northern Patagonian Ice Cap.
Good to see Cousino-Macul getting a mention - the point about their vineyards being swallowed up by Santiago is very apt. You can travel to the vineyard on the metro!