Why did slot CPUs exist?

Why did slot CPUs exist? slot cpu Buy Geonix GX-H81 Motherboard DDR3-1066, 1333, 1600 MHz High Speed USB LGA 1150 Support Intel 4th Gen CPU Slot slot macau138 Intel Slot 1 processors stand out as a bit unusual in the CPU world, rising vertically

slot macau138 A 242-pin slot on the motherboard that holds Intel CPU modules including the Intel Single Edge Contact Cartridge and Single Edge Processor

slot pakde123 Two Thunderbolt USB 4 ports, HDMI port, SDXC card slot, headphone jack, MagSafe 3 port CPU and 10-core GPU Processor 512GB Storage Need a moment? Keep all Cumputer CPU chip illustration in isometric vector design · SANTA CLARA, Calif · Macro Close-up Shot of Computer Motherboard with CPU Processor Socket