You guys should look at the new M.2 PCIE 4x USB adapters.
M.2 -> 4x PCIEx1 with usb cables. You can stop using those PCIE X1 things and connect to M.2 slots with USB directly. No mishaps or mistakes any more.
Not bought one myself but looking to try them out if they have better availability. Not seen too many sellers but some in China that take their time to ship.
Here a example:
BEYIMEI M.2 NVME to 4 Ports PCI-E 1X USB 3.0 Riser Card, M.2 B-Key PCI-E Interface for Bitcoin Miner Ethereum Mininghttps://www.amazon.com/BEYIMEI-M-2-Interface-Bitcoin-Ethereum/dp/B09YHDPSC8/For $50 you can buy a motherboard for 8 video cards, a processor and a cooling system for the processor, and your device costs $30. Goods from China can take 45 days, but if you order in advance, then this is a good and proven motherboard.