Nice points. Apple is not growing revenue all that much.
In 2015, revenue was $234B, EPS = $9.22, and div = $2.03 for a year-end price of $105.26.
Four years later, 2019, revenue was $260B, EPS = $11.89, and div = $3.04 for a year-end price of $293.65.
On an annualized basis, revenue grew 2.67%, EPS 6.56%, and div 10.62%, while the share price grew 29.24%.
So none of these metrics by themselves seem to explain why the share price tripled in 4 years. Someone more knowledgeable about Apple may be able to explain how shareholders gained so much value, but the high P/S valuation does seem to be motivated by more than just growth in revenue. Dividend growth and stock buybacks may be the most compelling driver.
Getting back to Tesla, I also expect Tesla to grow revenue about 50% per year. But I also expect cash generation, profitability, market share and cost of debt to improve. I also expect the public reception of EV generally and Tesla in particular to improve. This is not just a demand issue, but rather it is cost of capital issue. When all these metrics are improving, Tesla gets to a much more defensible valuation. Right now, however, the stock price is largely driven by all these expectations of future improvements. This is why Tesla is volatile, so susceptible to mood swings in the market between bullish and bearish sentiment. Longer-term, all these improving fundamentals will undergird higher valuations, but in the shorter term traders are trying to predict (or provoke) market mood swings.
This is why I am a long-term bull. I can't predict the mood swings, but I can use them opportunistically. I have become proficient at accumulating when market sentiment is sour. Now with covered call, I'm attempting to harvest some of the excess when sentiment is sweet. Through it all I am hold or accumulating shares for the long-term. Good luck.