I think it is quite similar to EVs. No established player in the auto industry had any interest in developing them because it was seen as a risk to established

I think it is quite similar to EVs. No established player in the auto industry had any interest in developing them because it was seen as a risk to established business and partnerships. The EV1 was a great early start from 1996 that was literally crushed (see the documentary, Who Killed The Electric Car). Dealerships fight against EVs to this day. Wyoming just called for EV sales to be banned by 2035. Without Tesla sending the whole industry into a panic I just don’t think there would be any practical cars on the market today.