If the author wants to use the Model S as the benchmark for whether the Model 3 launch will be a success he should get his facts straight, or at least attempt an apples-to-apples comparison.
When Tesla went public in June 2010, it had only one alpha prototype of the Model S but brashly predicted it would launch the Model S in 2012 with an ultimate production goal of "up to approximately 20,000 cars per year."
TESLA MOTORS INC (Form: 424B4, Received: 06/29/2010 06:12:24)
Tesla did not even have the Fremont factory in hand until the fall of 2010 (although they had entered into an agreement with Toyota to buy it at the time of the IPO).
Practically everyone in the automotive business predicted Tesla would fail, but it launched the Model S in 2012 essentially as predicted in the June 2010 IPO. By the end of 2013 -- a little more than one year into production -- Tesla was already exceeding the 20,000 vehicle per year run rate. They are now producing several times that number. And there is no real competitive threat to the Model S anywhere on the horizon even though it has been on the market for four years.
In other words, once Tesla had adequate funding from the IPO and a factory to build the Model S, it was off to the races.
Tesla has both Fremont and the Gigafactory, and has already raised $1.7B in capital to build the Model 3 (and Panasonic is raising $3.9B primarily to fund the Gigafactory). So if the author wants to use the Model S as a benchmark, that would mean the Model 3 is launched sometime in the fall 2017, with Tesla exiting 2018 exceeding the 500,000 Model 3 per year production run rate Elon has predicted and producing over 1,000,000 Model 3s per year within a couple years after that. And with no meaningful competition until some time after 2020.
That sounds pretty good to me. And, coincidentally, is a pretty fair forecast of how things will likely play out IMO.