Yes, I agree with this to an extent. I think the Harry Potter books/films have made it simultaneously more and less usable, if possible.
It's true that some original readers could not pronounce it- I was among them, and I clearly recall calling her "Hermy-own" before the movies corrected my pronunciation. So as far as ease of spelling/pronouncing it is concerned, it's now more usable. But also less usable if you want to avoid a heavy association.