alt Hacker NewsGiven that there had been wrongly installed letters continuously since at least 1956 and we have no proof that an entirely "correct" version ever existed, I'd consider the inverted H historically accurate and I hope it won't ever get fixed and especially not as an overreaction to the article.
Given that the original drawings did show all letters in the orientation that's obviously correct for the font, I'd be hesitant to say the upside-down installations were ever historically accurate. It most certainly wasn't FLW's vision.