Even the lack of AC vents is a solution in search of a problem. Nothing was wrong with directional air vents. Blowing cool air on your head, armpits, hands, etc when you're hot FEELS GOOD.
If all cars had been historically designed without directional air vents, then tesla came along and released directional air vents, they would be praised by the same fanboys who are currently praising the removal of such directional air control. "Musk is a genius for finally creating climate systems that can control the directional flow of the air!"
It's not about improving things, tesla appears just to like changing things to score points with people who need everything to be new and novel, even if the changes reduce functionality or reliability compared to the previous solutions. Touchscreens, auto door handles, gullwing doors, no AC vents all fit into this category of flawed thinking.