> Someday I'd like to do a "desktop literally built into the desk top"
For 7 years my desktop has been literally just a motherboard sitting on a cut-up yoga mat on my bookshelf. [1] The SSDs are piled next to it. My work PC is zip-tied to a milk crate. Don't let people fool you, you can be pretty creative with your definition of "case".
My old i5-2500K based build was like that for many, many years. It sat on my desk on top of an anti-static bag (that the motherboard came in). The new graphics card I had, which was a gtx 480 maybe, wouldn't fit in the old case I had.
It took me at least 5 years to get a new case, much to my wife's annoyance.
No idea, at the very least it didn't seem to build up a static charge, and it's worked fine for me for a long time. I imagine it probably depends on the specific yoga mat.
I used to just have it directly on the wood, which was fine too, but then I put it on top of an upside-down, powder-coated-metal IKEA drawer thing (so I could put the power supply underneath for more shelf space). My fiancee was worried it might get scratched and conduct at some point, so we added the yoga mat.
For 7 years my desktop has been literally just a motherboard sitting on a cut-up yoga mat on my bookshelf. [1] The SSDs are piled next to it. My work PC is zip-tied to a milk crate. Don't let people fool you, you can be pretty creative with your definition of "case".
[1] https://i.imgur.com/NkEmS4N.png