A hard drive is already much faster than an optical drive like a console would use, so in most situations, a SSD for disk images won't help Dolphin. It'll load a little faster if Dolphin itself is on an SSD, though, and you'll get less shader cache stuttering if your documents folder is on a SSD with fast write speeds.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
