But there are a few ways around this, including emulation via tools like VMWare. There are a few reasons you might want to do that: Combine that with a proliferation of external SSDs, and for the first time, running Windows off an external drive is viable.
Thanks to the speed of USB 3.1 and Thunderbolt 3 connections, it’s now possible for an external hard drive to match the read and write speeds of an internal drive.