Too many carmakers are aiming to take on Tesla (TSLA)

It's easy to get distracted from Tesla greatest achievement.
Elon Musk's upstart automaker builds, fast, sexy electric cars that are prized by the Silicon Valley elite.
They're the ultimate rolling status toys, $100,000-plus rides that can, in some configurations, outrun Ferraris and Lamborghinis. 
That's all wonderful, but Tesla's most meaningful "disruption" of the century-old auto industry is more prosaic: it created a market that really didn't exist before.
True, General Motors and othe