People tend not to be enthused about a request to essentially write an essay for a stranger.
How lazy from them.
I think a lot of valid answers could be a sentence or short paragraph, if the writer did not want to write an essay.
The issue is that humanity right now is sort of capped on innovation in any area outside AI. There is plenty of room for optimization of stuff. For example, quad rotor drones replaced the necessity to have a helicopter flying overhead for a lot of industries.