Was looking at new hair dryers last week to replace my wifes 32 year old
Gillette Promax Compact which BTW still works fine. I had to shorten (rewire) the wire where it exits the handle, because the rubber stress reliever sleeve was no longer doing its job.
My point here in bringing this up: The NEW hair dryers have a GFCI built directly into the plug at the end of the wire.

NB