Designcon 2020 Coming next week.
Leoni is leading their presentation in Booth 1049 with ACC Active Copper Data Center Cables. We already know they are partnered with Spectra7, so no need to speculate there.
High-performance 400 G ACCs and DACs Our active copper cables (ACCs) enable hyperscale, IoT, AI and 5G data transmission with low power need. They transmit 400 G over up to 7 m with less than 2W per end.
https://dcon20.mapyourshow.com/8_0/floorplan/?hallID=A&selectedBooth=booth~1049
Also, Molex, Amphenol, Luxshare, Keysight, etc...