My last couple of mobos have had them built-in, which I love so much it makes me wonder why they didn't start doing it sooner.

What exactly does the shield do?

Yeah, it's like the difference between sitting in a stopped car with all the doors open vs sitting in a moving car with the front driver and rear passenger windows open. The first one might feel cooler on a windy day, if the wind is blowing in the right direction, but the other will have consistent airflow from the outside through the car and back outside.

you put it in front of the AC

Could probably use some filters at least tho

Ideally you'd want to push all the heat out in one direction, two if you must. A case like this world spit heat out in most directions, which may pull it right back in.

I think it’s neat, I actually like the weird almost vapor wave aesthetic

Cheap also to cool just need a standard electric fan than any aftermarket cooling out there which are overly expensive in my opinion.

If you have ever seen a cooler master HAF XB EVO it's pretty much this but horizontal.

I felt a convulsing shudder roll up my innards, complete with subtle eye twitch at the peak, like a cherry on top, when I read your comment.

Faraday freedom

lightning rod

Next step, design intakes so we can put dust filters there

"Who's your favorite cooling brand? Corsair? BeQuiet? Noctua?"

"...Lasko."

An open case like this will generally be the coolest, the reasons you don’t do this are dust, noise, and just generally protecting the components.