That's still nowhere near https://www.i-pex.com/sites/default/files/inline-images/2_E.png https://www.i-pex.com/sites/default/files/inline-images/2_E.... this.

That's still nowhere near https://www.i-pex.com/sites/default/files/inline-images/2_E.png https://www.i-pex.com/sites/default/files/inline-images/2_E.... this. And they come in less than 1/100 of an inch(!) thickness, look at the OD table https://www.i-pex.com/products/micro-coax-discrete-wire https://www.i-pex.com/products/micro-coax-discrete-wire. It's total bonkers. An 50cm PCIe 4.0 x16 riser from 3M sells for 160 USD retail though...