@garius I think this point is undervalued. In the US the MPAA introduced the NC-17 rating in 1990 in response to adult entertainment co-opting ‘X’: as a teenager during the mid-90s, anything ‘X’ basically meant porn. It was only towards the end of the decade, with the X-Games and other similar ‘x-treme’ branding that the edge started to come off.
So it’s very easy for me to understand that less than a decade after even the movie industry had to abandon their labelling, people were still very sceptical about anything using that labelling. What’s not so easy to understand is why on Earth Musk would have thought it was a good idea, however, other than accepting the explanation he’s just a big man-child with too much money.