I like seeing these kinds of graphs in this forums. More of these please.
Good rackmount computer cases are often intentionally designed to be Faraday Cages to be steel on all 4 sides, because of the high interference regime of a server farm. Many server farms have extremely high cost power conditioning to get really clean electricity, but adjacent equipment can interference into each other, and so a modicum of shielding.
Now that being said, while there's little study on thick shielding on home computers, I am interested in seeing actual use cases, such as living under power transmission lines, or living in a tower containing lots of old equipment excessively near your computer (e.g. old sparking motor brushes in old equipment in a mechanical floor above you in your apartment building). Such thick shielding can play a good role, but don't forget your wire hygiene (e.g. Ethernet cables, mouse cables, etc).
In other words, if you need that much shielding for your computer (I would not be surprised, however, if least 0.001%+ of the world's homes definitely could benefit from this shielding -- it's not zero, but it's a bit extreme) --
then you definitely need to consider going wireless. Wireless keyboard, wireless mouse.
USB cables, especially poorly shielded ones, behave like antennas.
With inteference strong enough to need such thick metal shielding on a computer -- will also overcome the cheap shielding on mouse wires. Interference strong enough to overcome the signal, can create mouse lag/jitter from the USB error correction, if packets start dropping randomly on the USB cable due to extremely strong EMF's. This is a rare situation in the USA though where there are laws preventing building of houses too close to high voltage power transmission towers, but more common when laws on electricity grid are more lax and there's almost enough radiation of various kinds to almost compete with an outer space environment (not quite, but you get the idea of how unlucky some poor sap's are -- Not all countries are fairly clean of computer-affecting EMI/EMFs).
So woe is you if you shielded your computer but have a bunch of wires going out of it. You might as well just have a fiber optic line going into your computer tower (This is actually an option costing under $100 with an in-computer Media Converter device), and a power wire from, say, an offgrid lithium battery. Then you've got no metal touching your grid, and no metal acting as antennas between your controllers (keyboard/mouse) and the computer itself.
Just covering the obvious University Ph.D stuff that many NVIDIA engineers and tight-nanometer chip designers already knows.