I'll give you a hint, the technology doesn't define the product.
Product here is "L4 self-driving technology", not "car" as you seem to be implying. Yes, Tesla is shipping cars, but they are nowhere close to L4 self-driving (aka no one at the steering wheel).
> they actually have a product in the market
No they don't. They have a car on the market, and an L2 driving assistant. As I was implying above and again repeated by the post you replied to, there's no indication that you can transition from L2 to L4 in a gradual manner, so "L2 product in the market" means absolutely nothing.
Here's an analogy for you, I'm saying that Google is ahead of Intel in making a Quantum chip, and you tell me that Intel is right now shipping millions of classical chips, therefore they are closer to making quantum chips. My argument is that the jump from L2 to L4 is similar to classical vs quantum chips, and shipping millions of L2 cars does not mean you're any closer to L4 technology.
Where it counts for what? Tesla has demonstrated it can sell non-autonomous cars, Waymo has not, but the GP's point is it's not clear what bearing that has on making an autonomous car work.