Tell me about magnesium!

[Aquattro]

So years ago, nobody heard of Mg, probably couldn't buy it if you wanted. Corals grew like crazy, and had brilliant colors.
Skip to modern day, and everybody is dosing Mg. It's missing from salt, and we even have vendors specializing in it.
So, from my side, I've never needed it. People tell me I'm wrong, and it's not like the old days, blah blah.
So my new tank, using new salt, is growing corals really well, and they have great colors, and everything is doing fine. So maybe, just maybe, I need to look into this Mg thing a bit more. I just read that Dez added something like 47 tonnes a year to get the tank he has, and I'd like mine to look like that in a year.
Skip to today, I went and picked up a Mg kit, and I measure 1350mg with a salifert kit.

So if you've read all this and are still paying attention, why do I have proper levels? It's been 2 weeks since water change, tons of new growth, just like the old days. Am I alone in my need to NOT dose Mg? The only thing I can think of is my Ca reactor. It's big, and melts a lot of rubble. Perhaps this is keeping my Mg at the right level? Do others with large reactors not need to dose either? I thought it was something every successful reef needed in the hobby today.

So tell me where you fit in the Mg scheme, and if you don't dose, why and what results do you get?