Plop is an excellent software but I'm not sure it's still that useful. I remember using it to boot to usb sticks on bios that did not support it years ago. That was really cool
I used it to allow booting from USB on ESXi VMs, which (at the time anyway) didn't support this. I remember how ridiculous it was passing through an unraid USB, booting from a plop iso which then handed off the boot to the USB. It was slow but did work.