i want a custom PCIe card to do both basic vga video and provide 2x SATA for the single x16 slot, but both the routing, and components seem very complex :/

oh apparantly my motherboard just supports pcie bifurcation.

it's a fully passive lane split

these cards still cost a 100 euros

for a ribbon cable + 2 pcie connectors

apparently pcie bifurcation is a whole rabbithole