Not practical because of physics. It would ruin phone ergonomics and you'd end up with a brick. Or maybe requirea cumbersome adapter and lens assembly. New flag

Not practical because of physics. It would ruin phone ergonomics and you'd end up with a brick. Or maybe requirea cumbersome adapter and lens assembly. New flagship phone camera assemblies are big and ugly enough as it is. Phones with 3 or 4 cameras because the consumer demands it.