As Elon said, people really don't get it (with it=FSD). The $25k car already exists, it just doesn't cost $25k YET. A FSD enabled car will get ~5x as much use when compared to a car without FSD. Models S3XY with FSD ARE the $25k car. Depending on model, they will cost less than $25k, but people won't be able to buy them in the traditional sense. Instead people will buy a multiyear, unlimited (or limited) mileage license to be driven around in the car.
Everyone seems so focused on robotaxis in the literal sense, as if it's a taxi or uber. As others noted above, most people don't want to share a car with a bunch of random strangers. These $25k FSD enabled cars will likely be shared by small groups of "trusted" people (think friends, family, neighbors).
Of course there will also be generic robotaxis, that will cost even less to utilize, but will be just like taxis (i.e. used by random people).
I suspect this is why Elon was so bullish about FSD on the call. The cost to use or "co-own" a FSD enabled Model 3/Y is going to be so cheap, relative to the status quo of owning a car for individual use. This will financially incentivize people to use shared cars on the Tesla network (either with a small pool of "trusted" people, or random people in robotaxi mode). The revenue Tesla will generate, as others have calculated, is bonkers.
It's too bad most people didn't fully appreciate why Elon was on the call. He was on to not-so-subtly emphasize to shareholders than this FSD thing is coming, and will utterly shock the system when its switched on.
Sure cybertruck will be rad, and people are sad, because its delayed. However, their EXISTING car lineup + FSD is going to fundamentally change how we get around, and will not require any new engineering resources beyond what they've already sunk into 3/Y.