I wish the FCC would go back to doing their job re: radio interference and unintentional emissions. The entire concept of a computer case 'window' is about equally as anti-social and rude as littering in a public park. But it's so pervasive and socially accepted when I bring it up the only responses I receive are all quite hostile. Even worse are the computer builds that don't have any metal case at all. They're broadcasting that <30 MHz interference from the high speed switching electronics around the world, ruining a shared medium for everyone, and they have no idea.
And really, it's not the consumer's place to be aware of these things. It's the regulators'. And they've dropped the ball.
I run a handful of odroid sbcs constantly with 3x rtl-sdr usb radio receivers each. For their cases I used the cardboard box they shipped in covered in overlapping 2" conductive-glue backed copper tape. And lots of type/mix 63 ferrites on the cords.
I think the insides of a PC look more interesting than a flat piece of sheet metal. Adding addressable LEDs make that even more true.
Visually, I don't care particularly much one way or the other, but on a 6-12 layer PCB, there's plenty of opportunity to closely couple and shield fast-changing signals, so I wouldn't expect surrounding in a Faraday cage would be needed (and certainly I've never noticed an issue from the computers near my RF receivers).
And really, it's not the consumer's place to be aware of these things. It's the regulators'. And they've dropped the ball.