I will say that I saw it used in imaging computers in a college computer lab setting back in the early 2000's. I definitely wished my PCs could've done it.
In that exact same setting, I've seen PCs use PXE for the same purpose.
For sure. For one-offs plugging in a machine and having it act like a removable disk would be a lot easier than orchestrating a DHCP server and TFTP server (plus boot images) to support PXE. For mass numbers of machines, though, PXE is very handy. (I haven't kept up with PXE in the UEFI era to know how its changed/kept up. Everything I did with it-- netbooting tiny Linux distros to image machines, primarily, was back in the Windows XP thru 7 days.)
In that exact same setting, I've seen PCs use PXE for the same purpose.