There's no need to have 20 extra power cables taking up space in your case if you don't need them. Case manufacturers have started offering cases entirely devoid of 5.25" optical drive bays as well as 3.5" racks, or they have removable racks. I'm no stranger to building a computer from scratch; I have built dozens by now8 . Compare that to my old days of PC building where a large and heavy heatsink-fan would bend the back of the motherboard. In the glorious days of film, medium format projectors sold for between $1000 and $2000 and projected gloriously bright and high-resolution images. Most AIO units these days even have a USB connection and some desktop software to help monitor and automatically ramp up the fans and pump depending on CPU or GPU activity. If you shoot a large amount of photos and hate waiting for images to export or previews to generate, then a higher core count CPU like the Core i7 7820X 8 Core, Intel Core i9 7900X 10 Core, or even the Core i9 7940X 14 Core may be a great choice depending on your budget. And on that note, why should you have a case with unsightly internal and external drive bays you may never use?