My dream is a modern CPU with UEFI/CSM, and a motherboard that has no built-in chipset but instead gives me a serial port, a ps/2 port, memory slots, and expans

My dream is a modern CPU with UEFI/CSM, and a motherboard that has no built-in chipset but instead gives me a serial port, a ps/2 port, memory slots, and expansion ports on an eATX form factor. I can bring my own everything else. Given how many PCIe lanes that modern CPUs have, this should be doable. Then when the disk controller dies, I can just plop a new one in without messing around with surface mount components...