By traditional, I mean the methods people have used to appraise companies for hundreds of years. i.e., I'm predicting that given enough time, Tesla will revert to the mean, because literally every other publicly traded company that's ever existed has done this. Sure, maybe Tesla will be the first company since the 1600s to avoid this. After all, the only modeling data anyone doing anything has is historical data.
But that's a hell of a gamble to make if you're a Tesla shareholder.