I think the market gave Tesla that value when Model S+X sales were strong.
For me, the biggest miss for Elon on the Q1 call was the cannibalization question. The Model 3 is clearly taking away market share from the Model S, and the current refresh is unlikely to be enough.
There are Model 3 owners who would have stretched their finances to buy the Model S, but didn't because the Model 3 exists.
I'm worried the Model Y has done the same thing to the Model X, too. There are buyers who would stretch their finances to buy a Model X but are now waiting for a Model Y.
Apple saw this with the iPhone 5C. That's why there isn't a 5C phone anymore.