How do single slot and dual slot graphic cards differ?

While I appreciate a capable low-profile card, I feel as though Asrock missed a trick because it still takes a dual slot Asrock will say that

Intel is targeting this GPU at slimline workstations or small form factor PCs The larger A50 steps up to a dual-slot form factor, teraflops

dualit 4 slot lite toaster AMD 100-300000169 Radeon Pro W7900 Dual Slot GPU - 2x Slot - 48 GB GDDR6 - 384-Bit - PCIe x16 - 295 W

dualit long slot toaster There are a handful of entry level GPUs available for 2-slot configurations I have one: EVGA GeForce RTX 3050 8GB XC Gaming It's in a build (