No, I do not remember when MTB first came out. 1970s would be decades before I was born, so I guess I'm too young for that, but whatever.
"Getting used to" or "normative" isn't the sole problem of HyperScorpion.
Other bicycles can be out of norm, and people will still see it as bicycle.
Those scrambler/moped ebikes are way too much of motorcycle looking. Thus, catching unwanted attention.
You could argue that people aren't getting used to, or maybe their norm isn't quite there, but the fact is that, to many people's eyes, they look like motorcycles.
Let's talk about norm.
Japanese ebikes, so called "mamachari" style ebikes are very rare in the US.
Therefore, the Japanese style ebikes are out of the US norm.
However, if people in the US see Japanese ebikes for the first time, (Suzuki, Yamaha, Panasonic, Bridgestone, etc) do you think they would go like "Is this even legal??", "this look too much like a motorcycle", "it doesn't look like a bicycle"
Because HyperScorpion will have that problem.