Hybrid technology was introduced by Toyota and Honda 20 years ago and was immediately implemented in a way that made it practical for average buyers. Today, the Toyota Prius is one of the lowest TCO cars on the road.
.... And they still burn octane, and few people really
want to drive a Prius. Many more people
want to drive a Tesla, and they happen to be environmentally cleaner. Nobody really cared or tried to make a semi-practical fully electric vehicle until Tesla came along, and now they have successfully made it "cool" to own one.
Widespread adoption of EVs is going to require affordable vehicles (the Model 3 is a $60,000 car) and a network of charging stations that will allow people to conveniently and quickly recharge their cars. TCO will need to be as low as (or probably lower than) a Prius.
Tesla has done nothing to make any of that closer to being a reality.
Tesla has a huge network of charging stations. Other manufacturers need to play a HUGE game of catch up if they want a slice of the EV pie, which they do. Simply creating their network of chargers is forcing the hand of other automakers to match them, or will start to do so soon. (most manufacturers are aiming for 25-50% of sales to be fully electric starting in the 2020-2025 timeframe)
It is not really important that they have brought down prices more slowly than expected. They will do so eventually or face competition, or both, once everybody else has finished playing catch up with the charger situation of course.
By the way, I hope everybody else starts their game of catch up pretty soon because I'll be in the market for a new EV in 3-5 years and really don't want to buy a Tesla. I don't like their cars or their founder but I recognize what they have done. After all, the company is made up of talented designers and engineers who have created interesting and groundbreaking products, regardless of what an asshole Musk is.