You're thinking about this from the wrong direction. Parent is saying that not all 0x things are crypto (because it's the general signifier for hex), not that crypto people don't use 0x.
Not all 0x things are crypto, but it's safe to assume that nearly 100% of 0x things from people who used to have .eth in their name are references to crypto and not to any other context for hexadecimal numbers.
This was originally brought up in the context of saying that certain people removed eth and added 0x which is in context still clearly a reference to crypto, so the username fad just changed, and these probably (sadly) shouldn't be seen as Ethereum/crypto dying or losing popularity. Your implication is that Ethereum and crypto are dying and their users are en masse getting very interested in computer science and the hexadecimal numbering system and all happened to decide to change their names to include 0x for that reason, but it seems a lot more likely that the crypto cult is just playing follow the leader.
Oh I got that part, its just in a thread about crypto enthusiasts and professionals we are really wondering what/why 0x is being used for because this crypto professional didnt notice the extremely high correlation while using it in their other unrelated persona? kind of absurd, but its nice how polite everyone is being about it
