I'd much rather just have a custom mobo printed as a one-off than try to make a modular setup. Manufacturers are always split on what to put on which of their product lines, trying to anticipate consumer demand (and sometimes making some on the backend by including particular connections) and future-proofing. Some people just want the bare essentials for a home internet browsing experience, some people do advanced rendering, others do audio mixing, still others use theirs as home servers and media centers, scientific research is often conducted with off-the-self parts comprising the base computer, and, like myself, many are dedicated online gamers seeking highest fps and lowest latency and heat. Maybe I don't have any apple products so I don't need ports for them. Maybe I don't use external hard drives or expensive DSR cameras that require special ports for high speed transfers. But I like to overclock so I'd like to have components that are of very high quality and the right inherent design to supply power levelly. I'd love to do a quad-sli but it seems like a waste without 64 pci-x lanes, plus I want to use dual m.2 ssds in raid 0, or how about 4x m.2 ssds in a raid 1+0, now I need at least 72 or 80 lanes for full uncompromising bandwidth and lowest latency. I'll keep dreaming, rant over.