Don’t forget that Waymo will always be a much lower margin business than search! Setting aside the decades of R&D expense, those cars require purchasing, maintenance, warehousing, etc.
but the companies that own them will or their insurance carriers.
Waymo may end up being great business. But it is unlikely to exceed what search is/was. For that reason, press X to doubt GP's claim that Alphabet is undervalued. "IT'S PRICED IN" [1]
[1] https://www.reddit.com/r/wallstreetbets/comments/eberem/ever...
Not having to pay drivers is an enormous source of profit.
It could be a big business. In fact, I hope it is. Lives will be saved. But there is still a lot to be worked out, and the margins will never be as sweet as those of search.