People really don't want to admit them being separate people. This guy just basically adopted all of Elon mannerisms, beliefs and interests to get attention. He "slips" up sometimes on purpose to keep the ambiguity but the real tell is he spends hours every day talking while Elon is appearing in other places, like on NYE you could listen to Adrian while seeing Elon and X at Trumps party in mar-a-lago.
Musk has had some cringe alts but Adrian is not one of them, he tolerates him because he's a massive fan who always has his back and he likes the attention all the speculation gets.