But - other tech stocks? Arguably justifiable. Since the risk free rate (treasuries) has cratered, this has altered the DCF calculation that analysts use to value a company (the outcome is essentially this: the company is worth more, because this risk free rate is used in discounting the PV vs FV of the company’s cash flows).
Thus, it makes sense to have companies worth more (compared to historical price-to- earnings comparisons).
Then on top of this, there is a somewhat deflationary force of tech companies providing more efficient means and processes to things - which further perpetuates the cycle of these companies being worth more (their inputs cost less and are less labile, and their outputs are greater than say, a mining or oil company)